15991364 has 12 divisors (see below), whose sum is σ = 28247184. Its totient is φ = 7920744.

The previous prime is 15991357. The next prime is 15991387. The reversal of 15991364 is 46319951.

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, 18254 + ... + 19109.

It is an arithmetic number, because the mean of its divisors is an integer number (2353932).

Almost surely, 2^15991364 is an apocalyptic number.

It is an amenable number.

15991364 is a deficient number, since it is larger than the sum of its proper divisors (12255820).

15991364 is a wasteful number, since it uses less digits than its factorization.

15991364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37474 (or 37472 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 15991364 is about 3998.9203542956. The cubic root of 15991364 is about 251.9388656607.

The spelling of 15991364 in words is "fifteen million, nine hundred ninety-one thousand, three hundred sixty-four".