397857700 has 36 divisors (see below), whose sum is σ = 864218992. Its totient is φ = 158983200.

The previous prime is 397857653. The next prime is 397857731. The reversal of 397857700 is 7758793.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185635 + ... + 187765.

Almost surely, 2^397857700 is an apocalyptic number.

It is an amenable number.

397857700 is an abundant number, since it is smaller than the sum of its proper divisors (466361292).

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

397857700 is a wasteful number, since it uses less digits than its factorization.

397857700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012 (or 4005 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 397857700 is about 19946.3705971788. The cubic root of 397857700 is about 735.4885609810.

The spelling of 397857700 in words is "three hundred ninety-seven million, eight hundred fifty-seven thousand, seven hundred".