397561232 has 20 divisors (see below), whose sum is σ = 796837020. Its totient is φ = 191925888.

The previous prime is 397561223. The next prime is 397561237. The reversal of 397561232 is 232165793.

It can be written as a sum of positive squares in 2 ways, for example, as 96746896 + 300814336 = 9836^2 + 17344^2 .

It is not an unprimeable number, because it can be changed into a prime (397561237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427943 + ... + 428870.

It is an arithmetic number, because the mean of its divisors is an integer number (39841851).

Almost surely, 2^397561232 is an apocalyptic number.

It is an amenable number.

397561232 is an abundant number, since it is smaller than the sum of its proper divisors (399275788).

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

397561232 is a wasteful number, since it uses less digits than its factorization.

397561232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856850 (or 856844 counting only the distinct ones).

The product of its digits is 68040, while the sum is 38.

The square root of 397561232 is about 19938.9375845354. The cubic root of 397561232 is about 735.3058298139.

It can be divided in two parts, 397561 and 232, that added together give a palindrome (397793).

The spelling of 397561232 in words is "three hundred ninety-seven million, five hundred sixty-one thousand, two hundred thirty-two".