3992640 has 56 divisors (see below), whose sum is σ = 12679680. Its totient is φ = 1064448.

The previous prime is 3992627. The next prime is 3992683. The reversal of 3992640 is 462993.

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, 1120 + ... + 3039.

Almost surely, 2^3992640 is an apocalyptic number.

3992640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3992640 is an abundant number, since it is smaller than the sum of its proper divisors (8687040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3992640 is a wasteful number, since it uses less digits than its factorization.

3992640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179 (or 4169 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 3992640 is about 1998.1591528204. The cubic root of 3992640 is about 158.6426848233.

The spelling of 3992640 in words is "three million, nine hundred ninety-two thousand, six hundred forty".