252643626 has 24 divisors (see below), whose sum is σ = 548349984. Its totient is φ = 84067560.

The previous prime is 252643609. The next prime is 252643637. The reversal of 252643626 is 626346252.

252643626 is a `hidden beast` number, since 2 + 5 + 2 + 643 + 6 + 2 + 6 = 666.

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 11 ways as a sum of consecutive naturals, for example, 1390 + ... + 22521.

It is an arithmetic number, because the mean of its divisors is an integer number (22847916).

Almost surely, 2^252643626 is an apocalyptic number.

252643626 is an abundant number, since it is smaller than the sum of its proper divisors (295706358).

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

252643626 is a wasteful number, since it uses less digits than its factorization.

252643626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24506 (or 24503 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 252643626 is about 15894.7672521494. The cubic root of 252643626 is about 632.1732503848.

Adding to 252643626 its reverse (626346252), we get a palindrome (878989878).

The spelling of 252643626 in words is "two hundred fifty-two million, six hundred forty-three thousand, six hundred twenty-six".