148 (number)

148 (one hundred [and] forty-eight) is the natural number following 147 and before 149.

← 147 148 149 →
← 140 141 142 143 144 145 146 147 148 149 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred forty-eight
Ordinal	148th (one hundred forty-eighth)
Factorization	22 × 37
Divisors	1, 2, 4, 37, 74, 148
Greek numeral	ΡΜΗ´
Roman numeral	CXLVIII, cxlviii
Binary	100101002
Ternary	121113
Senary	4046
Octal	2248
Duodecimal	10412
Hexadecimal	9416

In mathematics

148 is the second number to be both a heptagonal number and a centered heptagonal number (the first is 1).^[1] It is the twelfth member of the Mian–Chowla sequence, the lexicographically smallest sequence of distinct positive integers with distinct pairwise sums.^[2]

There are 148 perfect graphs with six vertices,^[3] and 148 ways of partitioning four people into subsets, ordering the subsets, and selecting a leader for each subset.^[4]

In other fields

Dunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable interpersonal relationships. Dunbar predicted a "mean group size" of 148,^[5] but this is commonly rounded to 150.