15663968 has 24 divisors (see below), whose sum is σ = 31593240. Its totient is φ = 7640320.

The previous prime is 15663941. The next prime is 15663971. The reversal of 15663968 is 86936651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4658 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (1316385).

Almost surely, 2^15663968 is an apocalyptic number.

It is an amenable number.

15663968 is an abundant number, since it is smaller than the sum of its proper divisors (15929272).

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

15663968 is a wasteful number, since it uses less digits than its factorization.

15663968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11990 (or 11982 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The square root of 15663968 is about 3957.7731112331. The cubic root of 15663968 is about 250.2076568002.

The spelling of 15663968 in words is "fifteen million, six hundred sixty-three thousand, nine hundred sixty-eight".