3977986 has 16 divisors (see below), whose sum is σ = 6168960. Its totient is φ = 1922800.

The previous prime is 3977977. The next prime is 3977999. The reversal of 3977986 is 6897793.

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, 9285 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (385560).

Almost surely, 2^3977986 is an apocalyptic number.

3977986 is a deficient number, since it is larger than the sum of its proper divisors (2190974).

3977986 is a wasteful number, since it uses less digits than its factorization.

3977986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569.

The product of its digits is 571536, while the sum is 49.

The square root of 3977986 is about 1994.4889069634. The cubic root of 3977986 is about 158.4483606120.

The spelling of 3977986 in words is "three million, nine hundred seventy-seven thousand, nine hundred eighty-six".