397902800 has 90 divisors (see below), whose sum is σ = 981159858. Its totient is φ = 155018240.

The previous prime is 397902761. The next prime is 397902821. The reversal of 397902800 is 8209793.

It can be written as a sum of positive squares in 9 ways, for example, as 42354064 + 355548736 = 6508^2 + 18856^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2904332 + ... + 2904468.

Almost surely, 2^397902800 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397902800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490579929).

397902800 is an abundant number, since it is smaller than the sum of its proper divisors (583257058).

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

397902800 is a wasteful number, since it uses less digits than its factorization.

397902800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 397902800 is about 19947.5010966286. The cubic root of 397902800 is about 735.5163508841.

The spelling of 397902800 in words is "three hundred ninety-seven million, nine hundred two thousand, eight hundred".