15990964 has 12 divisors (see below), whose sum is σ = 30528288. Its totient is φ = 7268600.

The previous prime is 15990917. The next prime is 15990973. The reversal of 15990964 is 46909951.

It is a self number, because there is not a number n which added to its sum of digits gives 15990964.

It is a congruent number.

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, 181672 + ... + 181759.

It is an arithmetic number, because the mean of its divisors is an integer number (2544024).

Almost surely, 2^15990964 is an apocalyptic number.

It is an amenable number.

15990964 is a deficient number, since it is larger than the sum of its proper divisors (14537324).

15990964 is a wasteful number, since it uses less digits than its factorization.

15990964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363446 (or 363444 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 15990964 is about 3998.8703404837. The cubic root of 15990964 is about 251.9367650188.

The spelling of 15990964 in words is "fifteen million, nine hundred ninety thousand, nine hundred sixty-four".