15977946 has 16 divisors (see below), whose sum is σ = 32735808. Its totient is φ = 5196000.

The previous prime is 15977933. The next prime is 15977957. The reversal of 15977946 is 64977951.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15977895 and 15977904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32230 + ... + 32721.

It is an arithmetic number, because the mean of its divisors is an integer number (2045988).

Almost surely, 2^15977946 is an apocalyptic number.

15977946 is an abundant number, since it is smaller than the sum of its proper divisors (16757862).

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

15977946 is a wasteful number, since it uses less digits than its factorization.

15977946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64997.

The product of its digits is 476280, while the sum is 48.

The square root of 15977946 is about 3997.2422993859. The cubic root of 15977946 is about 251.8683804987.

The spelling of 15977946 in words is "fifteen million, nine hundred seventy-seven thousand, nine hundred forty-six".