3957215788 has 12 divisors (see below), whose sum is σ = 6988661680. Its totient is φ = 1960455312.

The previous prime is 3957215767. The next prime is 3957215879. The reversal of 3957215788 is 8875127593.

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, 4537656 + ... + 4538527.

Almost surely, 2^3957215788 is an apocalyptic number.

It is an amenable number.

3957215788 is a deficient number, since it is larger than the sum of its proper divisors (3031445892).

3957215788 is a wasteful number, since it uses less digits than its factorization.

3957215788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076296 (or 9076294 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 55.

The square root of 3957215788 is about 62906.4049839124. The cubic root of 3957215788 is about 1581.7211106620.

The spelling of 3957215788 in words is "three billion, nine hundred fifty-seven million, two hundred fifteen thousand, seven hundred eighty-eight".