3997445568 has 56 divisors (see below), whose sum is σ = 11133246720. Its totient is φ = 1262350080.

The previous prime is 3997445537. The next prime is 3997445581. The reversal of 3997445568 is 8655447993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544248 + ... + 551543.

Almost surely, 2^3997445568 is an apocalyptic number.

3997445568 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3997445568 is an abundant number, since it is smaller than the sum of its proper divisors (7135801152).

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

3997445568 is a wasteful number, since it uses less digits than its factorization.

3997445568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095825 (or 1095815 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 60.

The square root of 3997445568 is about 63225.3554201161. The cubic root of 3997445568 is about 1587.0630710085.

The spelling of 3997445568 in words is "three billion, nine hundred ninety-seven million, four hundred forty-five thousand, five hundred sixty-eight".