52866720 has 72 divisors (see below), whose sum is σ = 180412596. Its totient is φ = 14097408.

The previous prime is 52866703. The next prime is 52866743. The reversal of 52866720 is 2766825.

52866720 is a `hidden beast` number, since 528 + 66 + 72 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52012944 + 853776 = 7212^2 + 924^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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, 16917 + ... + 19796.

Almost surely, 2^52866720 is an apocalyptic number.

It is an amenable number.

52866720 is an abundant number, since it is smaller than the sum of its proper divisors (127545876).

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

52866720 is a wasteful number, since it uses less digits than its factorization.

52866720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36734 (or 36723 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 52866720 is about 7270.9504193056. The cubic root of 52866720 is about 375.3134446003.

The spelling of 52866720 in words is "fifty-two million, eight hundred sixty-six thousand, seven hundred twenty".