397215990504 has 128 divisors (see below), whose sum is σ = 1112604796800. Its totient is φ = 131300144640.

The previous prime is 397215990499. The next prime is 397215990559. The reversal of 397215990504 is 405099512793.

397215990504 is a `hidden beast` number, since 39 + 7 + 2 + 15 + 9 + 90 + 504 = 666.

It is a super-2 number, since 2×397215990504² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30206859 + ... + 30220005.

It is an arithmetic number, because the mean of its divisors is an integer number (8692224975).

Almost surely, 2^397215990504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397215990504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556302398400).

397215990504 is an abundant number, since it is smaller than the sum of its proper divisors (715388806296).

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

397215990504 is a wasteful number, since it uses less digits than its factorization.

397215990504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14320 (or 14310 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 397215990504 in words is "three hundred ninety-seven billion, two hundred fifteen million, nine hundred ninety thousand, five hundred four".