3997876872 has 64 divisors (see below), whose sum is σ = 11169264960. Its totient is φ = 1181926400.

The previous prime is 3997876847. The next prime is 3997876889. The reversal of 3997876872 is 2786787993.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 173853 + ... + 195500.

It is an arithmetic number, because the mean of its divisors is an integer number (174519765).

Almost surely, 2^3997876872 is an apocalyptic number.

It is an amenable number.

3997876872 is an abundant number, since it is smaller than the sum of its proper divisors (7171388088).

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

3997876872 is a wasteful number, since it uses less digits than its factorization.

3997876872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369414 (or 369410 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 66.

The square root of 3997876872 is about 63228.7661748986. The cubic root of 3997876872 is about 1587.1201476276.

The spelling of 3997876872 in words is "three billion, nine hundred ninety-seven million, eight hundred seventy-six thousand, eight hundred seventy-two".