397431760 has 60 divisors (see below), whose sum is σ = 1015692804. Its totient is φ = 144517120.

The previous prime is 397431733. The next prime is 397431773. The reversal of 397431760 is 67134793.

It can be written as a sum of positive squares in 2 ways, for example, as 84566416 + 312865344 = 9196^2 + 17688^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10849 + ... + 30208.

Almost surely, 2^397431760 is an apocalyptic number.

It is an amenable number.

397431760 is an abundant number, since it is smaller than the sum of its proper divisors (618261044).

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

397431760 is a wasteful number, since it uses less digits than its factorization.

397431760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41092 (or 41075 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 397431760 is about 19935.6906075511. The cubic root of 397431760 is about 735.2259998865.

The spelling of 397431760 in words is "three hundred ninety-seven million, four hundred thirty-one thousand, seven hundred sixty".