3977656 has 32 divisors (see below), whose sum is σ = 7796880. Its totient is φ = 1900800.

The previous prime is 3977653. The next prime is 3977663. The reversal of 3977656 is 6567793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21886 + ... + 22066.

Almost surely, 2^3977656 is an apocalyptic number.

It is an amenable number.

3977656 is a deficient number, since it is larger than the sum of its proper divisors (3819224).

3977656 is a wasteful number, since it uses less digits than its factorization.

3977656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 291 counting only the distinct ones).

The product of its digits is 238140, while the sum is 43.

The square root of 3977656 is about 1994.4061772869. The cubic root of 3977656 is about 158.4439790477.

The spelling of 3977656 in words is "three million, nine hundred seventy-seven thousand, six hundred fifty-six".