3957664828 has 12 divisors (see below), whose sum is σ = 7458676120. Its totient is φ = 1826614512.

The previous prime is 3957664807. The next prime is 3957664849. The reversal of 3957664828 is 8284667593.

It is an interprime number because it is at equal distance from previous prime (3957664807) and next prime (3957664849).

It is a super-2 number, since 2×3957664828² = 31326221781576539168, 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 3 ways as a sum of consecutive naturals, for example, 38054418 + ... + 38054521.

Almost surely, 2^3957664828 is an apocalyptic number.

It is an amenable number.

3957664828 is a deficient number, since it is larger than the sum of its proper divisors (3501011292).

3957664828 is a wasteful number, since it uses less digits than its factorization.

3957664828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76108956 (or 76108954 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The square root of 3957664828 is about 62909.9739945901. The cubic root of 3957664828 is about 1581.7809363258.

The spelling of 3957664828 in words is "three billion, nine hundred fifty-seven million, six hundred sixty-four thousand, eight hundred twenty-eight".