397740855072 has 384 divisors, whose sum is σ = 1178386513920. Its totient is φ = 116453376000.

The previous prime is 397740855067. The next prime is 397740855097. The reversal of 397740855072 is 270558047793.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1467678297 + ... + 1467678567.

It is an arithmetic number, because the mean of its divisors is an integer number (3068714880).

Almost surely, 2^397740855072 is an apocalyptic number.

397740855072 is a gapful number since it is divisible by the number (32) 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 397740855072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589193256960).

397740855072 is an abundant number, since it is smaller than the sum of its proper divisors (780645658848).

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

397740855072 is a wasteful number, since it uses less digits than its factorization.

397740855072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 397740855072 in words is "three hundred ninety-seven billion, seven hundred forty million, eight hundred fifty-five thousand, seventy-two".