3990756 has 72 divisors (see below), whose sum is σ = 11835936. Its totient is φ = 1034880.

The previous prime is 3990737. The next prime is 3990761. The reversal of 3990756 is 6570993.

It is a super-2 number, since 2×3990756² = 31852266903072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6160 + ... + 6776.

It is an arithmetic number, because the mean of its divisors is an integer number (164388).

Almost surely, 2^3990756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3990756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5917968).

3990756 is an abundant number, since it is smaller than the sum of its proper divisors (7845180).

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

3990756 is a wasteful number, since it uses less digits than its factorization.

3990756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 3990756 is about 1997.6876632747. The cubic root of 3990756 is about 158.6177280828.

The spelling of 3990756 in words is "three million, nine hundred ninety thousand, seven hundred fifty-six".