72655560 has 48 divisors (see below), whose sum is σ = 236131740. Its totient is φ = 19374720.

The previous prime is 72655559. The next prime is 72655571. The reversal of 72655560 is 6555627.

It can be written as a sum of positive squares in 2 ways, for example, as 70459236 + 2196324 = 8394^2 + 1482^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100551 + ... + 101270.

Almost surely, 2^72655560 is an apocalyptic number.

It is an amenable number.

72655560 is an abundant number, since it is smaller than the sum of its proper divisors (163476180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72655560 is a wasteful number, since it uses less digits than its factorization.

72655560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201838 (or 201831 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 72655560 is about 8523.8230859163. The cubic root of 72655560 is about 417.2755627337.

It can be divided in two parts, 726555 and 60, that added together give a triangular number (726615 = T₁₂₀₅).

The spelling of 72655560 in words is "seventy-two million, six hundred fifty-five thousand, five hundred sixty".