3977918 has 12 divisors (see below), whose sum is σ = 6941232. Its totient is φ = 1704780.

The previous prime is 3977903. The next prime is 3977921. The reversal of 3977918 is 8197793.

It is a super-2 number, since 2×3977918² = 31647663229448, which contains 22 as substring.

It is a congruent number.

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, 20198 + ... + 20393.

It is an arithmetic number, because the mean of its divisors is an integer number (578436).

Almost surely, 2^3977918 is an apocalyptic number.

3977918 is a deficient number, since it is larger than the sum of its proper divisors (2963314).

3977918 is a wasteful number, since it uses less digits than its factorization.

3977918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40607 (or 40600 counting only the distinct ones).

The product of its digits is 95256, while the sum is 44.

The square root of 3977918 is about 1994.4718599168. The cubic root of 3977918 is about 158.4474577640.

The spelling of 3977918 in words is "three million, nine hundred seventy-seven thousand, nine hundred eighteen".