72855772 has 24 divisors (see below), whose sum is σ = 143886960. Its totient is φ = 31973760.

The previous prime is 72855767. The next prime is 72855779. The reversal of 72855772 is 27755827.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72855779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27273 + ... + 29824.

It is an arithmetic number, because the mean of its divisors is an integer number (5995290).

Almost surely, 2^72855772 is an apocalyptic number.

It is an amenable number.

72855772 is a deficient number, since it is larger than the sum of its proper divisors (71031188).

72855772 is a wasteful number, since it uses less digits than its factorization.

72855772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57141 (or 57139 counting only the distinct ones).

The product of its digits is 274400, while the sum is 43.

The square root of 72855772 is about 8535.5592669725. The cubic root of 72855772 is about 417.6584971977.

The spelling of 72855772 in words is "seventy-two million, eight hundred fifty-five thousand, seven hundred seventy-two".