15312992 has 12 divisors (see below), whose sum is σ = 30147516. Its totient is φ = 7656480.

The previous prime is 15312989. The next prime is 15313019. The reversal of 15312992 is 29921351.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 478531 = 15312992 / (1 + 5 + 3 + 1 + 2 + 9 + 9 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239234 + ... + 239297.

It is an arithmetic number, because the mean of its divisors is an integer number (2512293).

Almost surely, 2^15312992 is an apocalyptic number.

It is an amenable number.

15312992 is a deficient number, since it is larger than the sum of its proper divisors (14834524).

15312992 is an equidigital number, since it uses as much as digits as its factorization.

15312992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478541 (or 478533 counting only the distinct ones).

The product of its digits is 4860, while the sum is 32.

The square root of 15312992 is about 3913.1818255737. The cubic root of 15312992 is about 248.3247566467.

The spelling of 15312992 in words is "fifteen million, three hundred twelve thousand, nine hundred ninety-two".