3999756 has 24 divisors (see below), whose sum is σ = 9399600. Its totient is φ = 1323712.

The previous prime is 3999739. The next prime is 3999763. The reversal of 3999756 is 6579993.

It is a happy number.

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, 670 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (391650).

Almost surely, 2^3999756 is an apocalyptic number.

It is an amenable number.

3999756 is an abundant number, since it is smaller than the sum of its proper divisors (5399844).

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

3999756 is a wasteful number, since it uses less digits than its factorization.

3999756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393 (or 2391 counting only the distinct ones).

The product of its digits is 459270, while the sum is 48.

The square root of 3999756 is about 1999.9389990697. The cubic root of 3999756 is about 158.7368774157.

The spelling of 3999756 in words is "three million, nine hundred ninety-nine thousand, seven hundred fifty-six".