252045690 has 32 divisors (see below), whose sum is σ = 651442176. Its totient is φ = 62041920.

The previous prime is 252045683. The next prime is 252045763. The reversal of 252045690 is 96540252.

It is a super-2 number, since 2×252045690² = 127054059695152200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322746 + ... + 323525.

It is an arithmetic number, because the mean of its divisors is an integer number (20357568).

Almost surely, 2^252045690 is an apocalyptic number.

252045690 is an abundant number, since it is smaller than the sum of its proper divisors (399396486).

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

252045690 is a wasteful number, since it uses less digits than its factorization.

252045690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646294.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 252045690 is about 15875.9469008938. The cubic root of 252045690 is about 631.6741313305.

The spelling of 252045690 in words is "two hundred fifty-two million, forty-five thousand, six hundred ninety".