397863900 has 216 divisors, whose sum is σ = 1478655360. Its totient is φ = 90901440.

The previous prime is 397863881. The next prime is 397863941. The reversal of 397863900 is 9368793.

It is a happy number.

397863900 is a `hidden beast` number, since 3 + 9 + 7 + 8 + 639 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 168931 + ... + 171269.

Almost surely, 2^397863900 is an apocalyptic number.

397863900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397863900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739327680).

397863900 is an abundant number, since it is smaller than the sum of its proper divisors (1080791460).

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

397863900 is a wasteful number, since it uses less digits than its factorization.

397863900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375 (or 2356 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 397863900 is about 19946.5260133187. The cubic root of 397863900 is about 735.4923814470.

The spelling of 397863900 in words is "three hundred ninety-seven million, eight hundred sixty-three thousand, nine hundred".