3990913956 has 48 divisors (see below), whose sum is σ = 10398864000. Its totient is φ = 1323612576.

The previous prime is 3990913951. The next prime is 3990913973. The reversal of 3990913956 is 6593190993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3990913951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71355 + ... + 114338.

It is an arithmetic number, because the mean of its divisors is an integer number (216643000).

Almost surely, 2^3990913956 is an apocalyptic number.

3990913956 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3990913956 is an abundant number, since it is smaller than the sum of its proper divisors (6407950044).

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

3990913956 is a wasteful number, since it uses less digits than its factorization.

3990913956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185905 (or 185897 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 54.

The square root of 3990913956 is about 63173.6808805692. The cubic root of 3990913956 is about 1586.1982077663.

The spelling of 3990913956 in words is "three billion, nine hundred ninety million, nine hundred thirteen thousand, nine hundred fifty-six".