252864636 has 12 divisors (see below), whose sum is σ = 590017512. Its totient is φ = 84288208.

The previous prime is 252864611. The next prime is 252864637. The reversal of 252864636 is 636468252.

It is a happy number.

252864636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252864637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10536015 + ... + 10536038.

It is an arithmetic number, because the mean of its divisors is an integer number (49168126).

Almost surely, 2^252864636 is an apocalyptic number.

It is an amenable number.

252864636 is an abundant number, since it is smaller than the sum of its proper divisors (337152876).

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

252864636 is a wasteful number, since it uses less digits than its factorization.

252864636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21072060 (or 21072058 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 252864636 is about 15901.7180203901. The cubic root of 252864636 is about 632.3575361726.

The spelling of 252864636 in words is "two hundred fifty-two million, eight hundred sixty-four thousand, six hundred thirty-six".