3990491736 has 256 divisors, whose sum is σ = 13529410560. Its totient is φ = 948879360.

The previous prime is 3990491731. The next prime is 3990491761. The reversal of 3990491736 is 6371940993.

3990491736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990491731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1160676 + ... + 1164108.

It is an arithmetic number, because the mean of its divisors is an integer number (52849260).

Almost surely, 2^3990491736 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 3990491736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6764705280).

3990491736 is an abundant number, since it is smaller than the sum of its proper divisors (9538918824).

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

3990491736 is a wasteful number, since it uses less digits than its factorization.

3990491736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514 (or 3510 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 51.

The square root of 3990491736 is about 63170.3390524382. The cubic root of 3990491736 is about 1586.1422683471.

The spelling of 3990491736 in words is "three billion, nine hundred ninety million, four hundred ninety-one thousand, seven hundred thirty-six".