397559904 has 96 divisors (see below), whose sum is σ = 1197939456. Its totient is φ = 113088000.

The previous prime is 397559873. The next prime is 397559947. The reversal of 397559904 is 409955793.

397559904 = 2481² + 2482² + ... + 2543².

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167494 + ... + 169850.

It is an arithmetic number, because the mean of its divisors is an integer number (12478536).

Almost surely, 2^397559904 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 397559904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598969728).

397559904 is an abundant number, since it is smaller than the sum of its proper divisors (800379552).

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

397559904 is a wasteful number, since it uses less digits than its factorization.

397559904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 51.

The square root of 397559904 is about 19938.9042828336. The cubic root of 397559904 is about 735.3050110828.

The spelling of 397559904 in words is "three hundred ninety-seven million, five hundred fifty-nine thousand, nine hundred four".