72855018 has 32 divisors (see below), whose sum is σ = 167486400. Its totient is φ = 23447088.

The previous prime is 72855011. The next prime is 72855031. The reversal of 72855018 is 81055827.

72855018 is a `hidden beast` number, since 72 + 85 + 501 + 8 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (72855011) 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, 21696 + ... + 24827.

It is an arithmetic number, because the mean of its divisors is an integer number (5233950).

Almost surely, 2^72855018 is an apocalyptic number.

72855018 is an abundant number, since it is smaller than the sum of its proper divisors (94631382).

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

72855018 is a wasteful number, since it uses less digits than its factorization.

72855018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46563 (or 46557 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 72855018 is about 8535.5150986921. The cubic root of 72855018 is about 417.6570563803.

The spelling of 72855018 in words is "seventy-two million, eight hundred fifty-five thousand, eighteen".