15985668 has 24 divisors (see below), whose sum is σ = 37588320. Its totient is φ = 5287360.

The previous prime is 15985649. The next prime is 15985679. The reversal of 15985668 is 86658951.

15985668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3513 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (1566180).

Almost surely, 2^15985668 is an apocalyptic number.

It is an amenable number.

15985668 is an abundant number, since it is smaller than the sum of its proper divisors (21602652).

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

15985668 is a wasteful number, since it uses less digits than its factorization.

15985668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10307 (or 10305 counting only the distinct ones).

The product of its digits is 518400, while the sum is 48.

The square root of 15985668 is about 3998.2080986362. The cubic root of 15985668 is about 251.9089492175.

It can be divided in two parts, 15985 and 668, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 15985668 in words is "fifteen million, nine hundred eighty-five thousand, six hundred sixty-eight".