252490639 has 16 divisors (see below), whose sum is σ = 271194880. Its totient is φ = 234368640.

The previous prime is 252490633. The next prime is 252490643. The reversal of 252490639 is 936094252.

It is a cyclic number.

It is not a de Polignac number, because 252490639 - 2³ = 252490631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252490631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306382 + ... + 307204.

It is an arithmetic number, because the mean of its divisors is an integer number (16949680).

Almost surely, 2^252490639 is an apocalyptic number.

252490639 is a deficient number, since it is larger than the sum of its proper divisors (18704241).

252490639 is a wasteful number, since it uses less digits than its factorization.

252490639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 252490639 is about 15889.9540276239. The cubic root of 252490639 is about 632.0456215732.

The spelling of 252490639 in words is "two hundred fifty-two million, four hundred ninety thousand, six hundred thirty-nine".