15979956 has 12 divisors (see below), whose sum is σ = 37286592. Its totient is φ = 5326648.

The previous prime is 15979921. The next prime is 15979979. The reversal of 15979956 is 65997951.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 15979899 and 15979908.

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, 665820 + ... + 665843.

It is an arithmetic number, because the mean of its divisors is an integer number (3107216).

Almost surely, 2^15979956 is an apocalyptic number.

It is an amenable number.

15979956 is an abundant number, since it is smaller than the sum of its proper divisors (21306636).

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

15979956 is a wasteful number, since it uses less digits than its factorization.

15979956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331670 (or 1331668 counting only the distinct ones).

The product of its digits is 765450, while the sum is 51.

The square root of 15979956 is about 3997.4937148168. The cubic root of 15979956 is about 251.8789416021.

The spelling of 15979956 in words is "fifteen million, nine hundred seventy-nine thousand, nine hundred fifty-six".