15956964 has 18 divisors (see below), whose sum is σ = 40335750. Its totient is φ = 5318976.

The previous prime is 15956959. The next prime is 15956977. The reversal of 15956964 is 46965951.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15920100 + 36864 = 3990^2 + 192^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221589 + ... + 221660.

It is an arithmetic number, because the mean of its divisors is an integer number (2240875).

Almost surely, 2^15956964 is an apocalyptic number.

It is an amenable number.

15956964 is an abundant number, since it is smaller than the sum of its proper divisors (24378786).

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

15956964 is a wasteful number, since it uses less digits than its factorization.

15956964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443259 (or 443254 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 15956964 is about 3994.6168777494. The cubic root of 15956964 is about 251.7580822724.

The spelling of 15956964 in words is "fifteen million, nine hundred fifty-six thousand, nine hundred sixty-four".