397652382720 has 528 divisors, whose sum is σ = 1409619583632. Its totient is φ = 103620280320.

The previous prime is 397652382707. The next prime is 397652382749. The reversal of 397652382720 is 27283256793.

397652382720 is a `hidden beast` number, since 3 + 9 + 76 + 523 + 8 + 27 + 20 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 14124847104 + 383527535616 = 118848^2 + 619296^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 542499474 + ... + 542500206.

Almost surely, 2^397652382720 is an apocalyptic number.

397652382720 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 397652382720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704809791816).

397652382720 is an abundant number, since it is smaller than the sum of its proper divisors (1011967200912).

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

397652382720 is a wasteful number, since it uses less digits than its factorization.

397652382720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 397652382720 in words is "three hundred ninety-seven billion, six hundred fifty-two million, three hundred eighty-two thousand, seven hundred twenty".