3997794872 has 16 divisors (see below), whose sum is σ = 7678692000. Its totient is φ = 1950143680.

The previous prime is 3997794869. The next prime is 3997794947. The reversal of 3997794872 is 2784977993.

It is a junction number, because it is equal to n+sod(n) for n = 3997794799 and 3997794808.

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, 6093872 + ... + 6094527.

It is an arithmetic number, because the mean of its divisors is an integer number (479918250).

Almost surely, 2^3997794872 is an apocalyptic number.

It is an amenable number.

3997794872 is a deficient number, since it is larger than the sum of its proper divisors (3680897128).

3997794872 is a wasteful number, since it uses less digits than its factorization.

3997794872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12188446 (or 12188442 counting only the distinct ones).

The product of its digits is 48009024, while the sum is 65.

The square root of 3997794872 is about 63228.1177325405. The cubic root of 3997794872 is about 1587.1092964729.

The spelling of 3997794872 in words is "three billion, nine hundred ninety-seven million, seven hundred ninety-four thousand, eight hundred seventy-two".