72885690 has 32 divisors (see below), whose sum is σ = 194362560. Its totient is φ = 19436112.

The previous prime is 72885661. The next prime is 72885697. The reversal of 72885690 is 9658827.

72885690 is a `hidden beast` number, since 7 + 2 + 88 + 569 + 0 = 666.

It is a super-2 number, since 2×72885690² = 10624647613552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (72885697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134704 + ... + 135243.

It is an arithmetic number, because the mean of its divisors is an integer number (6073830).

Almost surely, 2^72885690 is an apocalyptic number.

72885690 is an abundant number, since it is smaller than the sum of its proper divisors (121476870).

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

72885690 is a wasteful number, since it uses less digits than its factorization.

72885690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269963 (or 269957 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 72885690 is about 8537.3116377464. The cubic root of 72885690 is about 417.7156594355.

The spelling of 72885690 in words is "seventy-two million, eight hundred eighty-five thousand, six hundred ninety".