397372385520 has 800 divisors, whose sum is σ = 1653877716480. Its totient is φ = 87287777280.

The previous prime is 397372385489. The next prime is 397372385569. The reversal of 397372385520 is 25583273793.

397372385520 is a `hidden beast` number, since 3 + 9 + 7 + 37 + 2 + 3 + 85 + 520 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 31142982 + ... + 31155738.

Almost surely, 2^397372385520 is an apocalyptic number.

397372385520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397372385520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826938858240).

397372385520 is an abundant number, since it is smaller than the sum of its proper divisors (1256505330960).

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

397372385520 is a wasteful number, since it uses less digits than its factorization.

397372385520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12835 (or 12820 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 54.

The spelling of 397372385520 in words is "three hundred ninety-seven billion, three hundred seventy-two million, three hundred eighty-five thousand, five hundred twenty".