3972999012 has 48 divisors (see below), whose sum is σ = 9406250112. Its totient is φ = 1304951040.

The previous prime is 3972998963. The next prime is 3972999073. The reversal of 3972999012 is 2109992793.

It is a happy number.

It is a super-2 number, since 2×3972999012² = 31569442298705952288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1602718 + ... + 1605194.

It is an arithmetic number, because the mean of its divisors is an integer number (195963544).

Almost surely, 2^3972999012 is an apocalyptic number.

It is an amenable number.

3972999012 is an abundant number, since it is smaller than the sum of its proper divisors (5433251100).

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

3972999012 is a wasteful number, since it uses less digits than its factorization.

3972999012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388 (or 4386 counting only the distinct ones).

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 3972999012 is about 63031.7301999556. The cubic root of 3972999012 is about 1583.8212018239.

The spelling of 3972999012 in words is "three billion, nine hundred seventy-two million, nine hundred ninety-nine thousand, twelve".