397706900 has 18 divisors (see below), whose sum is σ = 863024190. Its totient is φ = 159082720.

The previous prime is 397706893. The next prime is 397706921. The reversal of 397706900 is 9607793.

It can be written as a sum of positive squares in 3 ways, for example, as 111555844 + 286151056 = 10562^2 + 16916^2 .

It is a super-2 number, since 2×397706900² = 316341556615220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1988435 + ... + 1988634.

Almost surely, 2^397706900 is an apocalyptic number.

It is an amenable number.

397706900 is an abundant number, since it is smaller than the sum of its proper divisors (465317290).

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

397706900 is a wasteful number, since it uses less digits than its factorization.

397706900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977083 (or 3977076 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 41.

The square root of 397706900 is about 19942.5901025920. The cubic root of 397706900 is about 735.3956251643.

The spelling of 397706900 in words is "three hundred ninety-seven million, seven hundred six thousand, nine hundred".