252790540 has 12 divisors (see below), whose sum is σ = 530860176. Its totient is φ = 101116208.

The previous prime is 252790537. The next prime is 252790547. The reversal of 252790540 is 45097252.

It is a super-2 number, since 2×252790540² = 127806114226983200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252790496 and 252790505.

It is not an unprimeable number, because it can be changed into a prime (252790547) 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, 6319744 + ... + 6319783.

It is an arithmetic number, because the mean of its divisors is an integer number (44238348).

Almost surely, 2^252790540 is an apocalyptic number.

252790540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252790540 is an abundant number, since it is smaller than the sum of its proper divisors (278069636).

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

252790540 is a wasteful number, since it uses less digits than its factorization.

252790540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12639536 (or 12639534 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 252790540 is about 15899.3880385378. The cubic root of 252790540 is about 632.2957643328.

The spelling of 252790540 in words is "two hundred fifty-two million, seven hundred ninety thousand, five hundred forty".