252778626 has 24 divisors (see below), whose sum is σ = 548795520. Its totient is φ = 84089016.

The previous prime is 252778577. The next prime is 252778637. The reversal of 252778626 is 626877252.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4906 + ... + 23013.

It is an arithmetic number, because the mean of its divisors is an integer number (22866480).

Almost surely, 2^252778626 is an apocalyptic number.

252778626 is an abundant number, since it is smaller than the sum of its proper divisors (296016894).

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

252778626 is a wasteful number, since it uses less digits than its factorization.

252778626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28430 (or 28427 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 252778626 is about 15899.0133656149. The cubic root of 252778626 is about 632.2858308254.

The spelling of 252778626 in words is "two hundred fifty-two million, seven hundred seventy-eight thousand, six hundred twenty-six".