15381868 has 12 divisors (see below), whose sum is σ = 28335160. Its totient is φ = 7286112.

The previous prime is 15381857. The next prime is 15381881. The reversal of 15381868 is 86818351.

It is a self number, because there is not a number n which added to its sum of digits gives 15381868.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101121 + ... + 101272.

Almost surely, 2^15381868 is an apocalyptic number.

It is an amenable number.

15381868 is a deficient number, since it is larger than the sum of its proper divisors (12953292).

15381868 is a wasteful number, since it uses less digits than its factorization.

15381868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202416 (or 202414 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 15381868 is about 3921.9724629324. The cubic root of 15381868 is about 248.6965114827.

The spelling of 15381868 in words is "fifteen million, three hundred eighty-one thousand, eight hundred sixty-eight".