397908400 has 60 divisors (see below), whose sum is σ = 969141592. Its totient is φ = 156971520.

The previous prime is 397908389. The next prime is 397908419. The reversal of 397908400 is 4809793.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 22387 + ... + 36013.

Almost surely, 2^397908400 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 397908400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (484570796).

397908400 is an abundant number, since it is smaller than the sum of its proper divisors (571233192).

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

397908400 is a wasteful number, since it uses less digits than its factorization.

397908400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13718 (or 13707 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 397908400 is about 19947.6414645943. The cubic root of 397908400 is about 735.5198013685.

The spelling of 397908400 in words is "three hundred ninety-seven million, nine hundred eight thousand, four hundred".