3992155172 has 12 divisors (see below), whose sum is σ = 7290022656. Its totient is φ = 1909291560.

The previous prime is 3992155147. The next prime is 3992155201. The reversal of 3992155172 is 2715512993.

It is a happy 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, 21696404 + ... + 21696587.

It is an arithmetic number, because the mean of its divisors is an integer number (607501888).

Almost surely, 2^3992155172 is an apocalyptic number.

It is an amenable number.

3992155172 is a deficient number, since it is larger than the sum of its proper divisors (3297867484).

3992155172 is a wasteful number, since it uses less digits than its factorization.

3992155172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43393018 (or 43393016 counting only the distinct ones).

The product of its digits is 170100, while the sum is 44.

The square root of 3992155172 is about 63183.5039547507. The cubic root of 3992155172 is about 1586.3626321350.

The spelling of 3992155172 in words is "three billion, nine hundred ninety-two million, one hundred fifty-five thousand, one hundred seventy-two".