3999956 has 12 divisors (see below), whose sum is σ = 7368480. Its totient is φ = 1894680.

The previous prime is 3999949. The next prime is 3999971. The reversal of 3999956 is 6599993.

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, 26240 + ... + 26391.

It is an arithmetic number, because the mean of its divisors is an integer number (614040).

Almost surely, 2^3999956 is an apocalyptic number.

It is an amenable number.

3999956 is a deficient number, since it is larger than the sum of its proper divisors (3368524).

3999956 is a wasteful number, since it uses less digits than its factorization.

3999956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52654 (or 52652 counting only the distinct ones).

The product of its digits is 590490, while the sum is 50.

The square root of 3999956 is about 1999.9889999697. The cubic root of 3999956 is about 158.7395231476.

The spelling of 3999956 in words is "three million, nine hundred ninety-nine thousand, nine hundred fifty-six".