252131728 has 20 divisors (see below), whose sum is σ = 489179008. Its totient is φ = 125892000.

The previous prime is 252131717. The next prime is 252131753. The reversal of 252131728 is 827131252.

It is a self number, because there is not a number n which added to its sum of digits gives 252131728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525 + ... + 22507.

Almost surely, 2^252131728 is an apocalyptic number.

It is an amenable number.

252131728 is a deficient number, since it is larger than the sum of its proper divisors (237047280).

252131728 is a wasteful number, since it uses less digits than its factorization.

252131728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21742 (or 21736 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 252131728 is about 15878.6563663302. The cubic root of 252131728 is about 631.7459989828.

The spelling of 252131728 in words is "two hundred fifty-two million, one hundred thirty-one thousand, seven hundred twenty-eight".