252565440 has 56 divisors (see below), whose sum is σ = 801898320. Its totient is φ = 67350528.

The previous prime is 252565351. The next prime is 252565471. The reversal of 252565440 is 44565252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130585 + ... + 132504.

Almost surely, 2^252565440 is an apocalyptic number.

252565440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252565440 is an abundant number, since it is smaller than the sum of its proper divisors (549332880).

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

252565440 is a wasteful number, since it uses less digits than its factorization.

252565440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263109 (or 263099 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 252565440 is about 15892.3075731626. The cubic root of 252565440 is about 632.1080304566.

The spelling of 252565440 in words is "two hundred fifty-two million, five hundred sixty-five thousand, four hundred forty".