397271656320 has 1024 divisors, whose sum is σ = 1725898752000. Its totient is φ = 75173068800.

The previous prime is 397271656273. The next prime is 397271656333. The reversal of 397271656320 is 23656172793.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 77909131 + ... + 77914229.

It is an arithmetic number, because the mean of its divisors is an integer number (1685448000).

Almost surely, 2^397271656320 is an apocalyptic number.

397271656320 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 397271656320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862949376000).

397271656320 is an abundant number, since it is smaller than the sum of its proper divisors (1328627095680).

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

397271656320 is a wasteful number, since it uses less digits than its factorization.

397271656320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5187 (or 5175 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 51.

The spelling of 397271656320 in words is "three hundred ninety-seven billion, two hundred seventy-one million, six hundred fifty-six thousand, three hundred twenty".