397645900 has 18 divisors (see below), whose sum is σ = 862891820. Its totient is φ = 159058320.

The previous prime is 397645849. The next prime is 397645907. The reversal of 397645900 is 9546793.

It is not an unprimeable number, because it can be changed into a prime (397645907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1988130 + ... + 1988329.

Almost surely, 2^397645900 is an apocalyptic number.

It is an amenable number.

397645900 is an abundant number, since it is smaller than the sum of its proper divisors (465245920).

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

397645900 is a wasteful number, since it uses less digits than its factorization.

397645900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976473 (or 3976466 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 397645900 is about 19941.0606538368. The cubic root of 397645900 is about 735.3580250901.

The spelling of 397645900 in words is "three hundred ninety-seven million, six hundred forty-five thousand, nine hundred".