15872994 has 12 divisors (see below), whose sum is σ = 34391526. Its totient is φ = 5290992.

The previous prime is 15872971. The next prime is 15873001. The reversal of 15872994 is 49927851.

It can be written as a sum of positive squares in only one way, i.e., 14538969 + 1334025 = 3813^2 + 1155^2 .

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 5 ways as a sum of consecutive naturals, for example, 440899 + ... + 440934.

Almost surely, 2^15872994 is an apocalyptic number.

15872994 is an abundant number, since it is smaller than the sum of its proper divisors (18518532).

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

15872994 is a wasteful number, since it uses less digits than its factorization.

15872994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881841 (or 881838 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 15872994 is about 3984.0926194053. The cubic root of 15872994 is about 251.3156982719.

The spelling of 15872994 in words is "fifteen million, eight hundred seventy-two thousand, nine hundred ninety-four".