13977656 has 32 divisors (see below), whose sum is σ = 32676480. Its totient is φ = 5445600.

The previous prime is 13977647. The next prime is 13977671. The reversal of 13977656 is 65677931.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

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, 10730 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (1021140).

Almost surely, 2^13977656 is an apocalyptic number.

It is an amenable number.

13977656 is an abundant number, since it is smaller than the sum of its proper divisors (18698824).

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

13977656 is a wasteful number, since it uses less digits than its factorization.

13977656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715 (or 22711 counting only the distinct ones).

The product of its digits is 238140, while the sum is 44.

The square root of 13977656 is about 3738.6703518765. The cubic root of 13977656 is about 240.8859385757.

The spelling of 13977656 in words is "thirteen million, nine hundred seventy-seven thousand, six hundred fifty-six".