15481864 has 16 divisors (see below), whose sum is σ = 29077200. Its totient is φ = 7727952.

The previous prime is 15481859. The next prime is 15481871. The reversal of 15481864 is 46818451.

It is a super-2 number, since 2×15481864² = 479376225828992, which contains 22 as substring.

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, 5067 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (1817325).

Almost surely, 2^15481864 is an apocalyptic number.

It is an amenable number.

15481864 is a deficient number, since it is larger than the sum of its proper divisors (13595336).

15481864 is a wasteful number, since it uses less digits than its factorization.

15481864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252 (or 3248 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 15481864 is about 3934.6999885633. The cubic root of 15481864 is about 249.2342649942.

The spelling of 15481864 in words is "fifteen million, four hundred eighty-one thousand, eight hundred sixty-four".