3990397140 has 72 divisors (see below), whose sum is σ = 12109432608. Its totient is φ = 1063646400.

The previous prime is 3990397139. The next prime is 3990397141. The reversal of 3990397140 is 417930993.

3990397140 is a `hidden beast` number, since 39 + 90 + 397 + 140 = 666.

3990397140 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3990397139) and next prime (3990397141).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990397141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 703315 + ... + 708965.

It is an arithmetic number, because the mean of its divisors is an integer number (168186564).

Almost surely, 2^3990397140 is an apocalyptic number.

3990397140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3990397140 is an abundant number, since it is smaller than the sum of its proper divisors (8119035468).

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

3990397140 is a wasteful number, since it uses less digits than its factorization.

3990397140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9589 (or 9584 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 3990397140 is about 63169.5903105284. The cubic root of 3990397140 is about 1586.1297348960.

The spelling of 3990397140 in words is "three billion, nine hundred ninety million, three hundred ninety-seven thousand, one hundred forty".