3990660 has 48 divisors (see below), whose sum is σ = 11261376. Its totient is φ = 1055872.

The previous prime is 3990641. The next prime is 3990689. The reversal of 3990660 is 660993.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13474 + ... + 13766.

It is an arithmetic number, because the mean of its divisors is an integer number (234612).

Almost surely, 2^3990660 is an apocalyptic number.

3990660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3990660 is an abundant number, since it is smaller than the sum of its proper divisors (7270716).

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

3990660 is a wasteful number, since it uses less digits than its factorization.

3990660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 3990660 is about 1997.6636353501. The cubic root of 3990660 is about 158.6164561915.

The spelling of 3990660 in words is "three million, nine hundred ninety thousand, six hundred sixty".