252638889 has 16 divisors (see below), whose sum is σ = 345842112. Its totient is φ = 163957248.

The previous prime is 252638879. The next prime is 252638899. The reversal of 252638889 is 988836252.

It is an interprime number because it is at equal distance from previous prime (252638879) and next prime (252638899).

It is not a de Polignac number, because 252638889 - 2⁵ = 252638857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252638879) 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, 37249 + ... + 43505.

It is an arithmetic number, because the mean of its divisors is an integer number (21615132).

Almost surely, 2^252638889 is an apocalyptic number.

It is an amenable number.

252638889 is a deficient number, since it is larger than the sum of its proper divisors (93203223).

252638889 is a wasteful number, since it uses less digits than its factorization.

252638889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616.

The product of its digits is 1658880, while the sum is 51.

The square root of 252638889 is about 15894.6182401466. The cubic root of 252638889 is about 632.1692993340.

The spelling of 252638889 in words is "two hundred fifty-two million, six hundred thirty-eight thousand, eight hundred eighty-nine".