397457712 has 80 divisors (see below), whose sum is σ = 1149232000. Its totient is φ = 131512896.

The previous prime is 397457707. The next prime is 397457743. The reversal of 397457712 is 217754793.

397457712 is a `hidden beast` number, since 3 + 9 + 74 + 577 + 1 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56739 + ... + 63357.

It is an arithmetic number, because the mean of its divisors is an integer number (14365400).

Almost surely, 2^397457712 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 397457712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574616000).

397457712 is an abundant number, since it is smaller than the sum of its proper divisors (751774288).

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

397457712 is a wasteful number, since it uses less digits than its factorization.

397457712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775 (or 6763 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 397457712 is about 19936.3414898521. The cubic root of 397457712 is about 735.2420027762.

The spelling of 397457712 in words is "three hundred ninety-seven million, four hundred fifty-seven thousand, seven hundred twelve".