397789564 has 12 divisors (see below), whose sum is σ = 707931000. Its totient is φ = 195523568.

The previous prime is 397789541. The next prime is 397789583. The reversal of 397789564 is 465987793.

It is a junction number, because it is equal to n+sod(n) for n = 397789499 and 397789508.

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, 842539 + ... + 843010.

It is an arithmetic number, because the mean of its divisors is an integer number (58994250).

Almost surely, 2^397789564 is an apocalyptic number.

It is an amenable number.

397789564 is a deficient number, since it is larger than the sum of its proper divisors (310141436).

397789564 is a wasteful number, since it uses less digits than its factorization.

397789564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685612 (or 1685610 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 58.

The square root of 397789564 is about 19944.6625441495. The cubic root of 397789564 is about 735.4465726775.

The spelling of 397789564 in words is "three hundred ninety-seven million, seven hundred eighty-nine thousand, five hundred sixty-four".