397983638364 has 48 divisors (see below), whose sum is σ = 1017011667840. Its totient is φ = 120380967360.

The previous prime is 397983638359. The next prime is 397983638383. The reversal of 397983638364 is 463836389793.

It is a congruent number.

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, 21610942 + ... + 21629349.

It is an arithmetic number, because the mean of its divisors is an integer number (21187743080).

Almost surely, 2^397983638364 is an apocalyptic number.

It is an amenable number.

397983638364 is an abundant number, since it is smaller than the sum of its proper divisors (619028029476).

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

397983638364 is a wasteful number, since it uses less digits than its factorization.

397983638364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43240370 (or 43240368 counting only the distinct ones).

The product of its digits is 423263232, while the sum is 69.

The spelling of 397983638364 in words is "three hundred ninety-seven billion, nine hundred eighty-three million, six hundred thirty-eight thousand, three hundred sixty-four".