72455580 has 48 divisors (see below), whose sum is σ = 225419040. Its totient is φ = 19321344.

The previous prime is 72455549. The next prime is 72455671. The reversal of 72455580 is 8555427.

It is a happy number.

72455580 is a `hidden beast` number, since 7 + 24 + 55 + 580 = 666.

It is a super-3 number, since 3×72455580³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66549 + ... + 67628.

It is an arithmetic number, because the mean of its divisors is an integer number (4696230).

Almost surely, 2^72455580 is an apocalyptic number.

It is an amenable number.

72455580 is an abundant number, since it is smaller than the sum of its proper divisors (152963460).

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

72455580 is a wasteful number, since it uses less digits than its factorization.

72455580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134195 (or 134187 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 72455580 is about 8512.0843510858. The cubic root of 72455580 is about 416.8923690959.

The spelling of 72455580 in words is "seventy-two million, four hundred fifty-five thousand, five hundred eighty".