252638890 has 32 divisors (see below), whose sum is σ = 521080704. Its totient is φ = 86391360.

The previous prime is 252638879. The next prime is 252638899. The reversal of 252638890 is 98836252.

It is not an unprimeable number, because it can be changed into a prime (252638899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23245 + ... + 32335.

It is an arithmetic number, because the mean of its divisors is an integer number (16283772).

Almost surely, 2^252638890 is an apocalyptic number.

252638890 is an abundant number, since it is smaller than the sum of its proper divisors (268441814).

252638890 is a wasteful number, since it uses less digits than its factorization.

252638890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9502.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 252638890 is about 15894.6182716038. The cubic root of 252638890 is about 632.1693001680.

The spelling of 252638890 in words is "two hundred fifty-two million, six hundred thirty-eight thousand, eight hundred ninety".