3990231912 has 32 divisors (see below), whose sum is σ = 10409302080. Its totient is φ = 1272247680.

The previous prime is 3990231901. The next prime is 3990231919. The reversal of 3990231912 is 2191320993.

It is not an unprimeable number, because it can be changed into a prime (3990231919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3613789 + ... + 3614892.

It is an arithmetic number, because the mean of its divisors is an integer number (325290690).

Almost surely, 2^3990231912 is an apocalyptic number.

It is an amenable number.

3990231912 is an abundant number, since it is smaller than the sum of its proper divisors (6419070168).

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

3990231912 is a wasteful number, since it uses less digits than its factorization.

3990231912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7228713 (or 7228709 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 3990231912 is about 63168.2824841708. The cubic root of 3990231912 is about 1586.1078426171.

The spelling of 3990231912 in words is "three billion, nine hundred ninety million, two hundred thirty-one thousand, nine hundred twelve".