3997994008 has 16 divisors (see below), whose sum is σ = 7506560880. Its totient is φ = 1996244448.

The previous prime is 3997993991. The next prime is 3997994047. The reversal of 3997994008 is 8004997993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337891 + ... + 349522.

It is an arithmetic number, because the mean of its divisors is an integer number (469160055).

Almost surely, 2^3997994008 is an apocalyptic number.

It is an amenable number.

3997994008 is a deficient number, since it is larger than the sum of its proper divisors (3508566872).

3997994008 is a wasteful number, since it uses less digits than its factorization.

3997994008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688146 (or 688142 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 3997994008 is about 63229.6924553647. The cubic root of 3997994008 is about 1587.1356481125.

The spelling of 3997994008 in words is "three billion, nine hundred ninety-seven million, nine hundred ninety-four thousand, eight".