397808 has 30 divisors (see below), whose sum is σ = 822864. Its totient is φ = 186208.

The previous prime is 397807. The next prime is 397811. The reversal of 397808 is 808793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397807) 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, 8441 + ... + 8487.

2³⁹⁷⁸⁰⁸ 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 397808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411432).

397808 is an abundant number, since it is smaller than the sum of its proper divisors (425056).

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

397808 is a wasteful number, since it uses less digits than its factorization.

397808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 397808 is about 630.7202232369. The cubic root of 397808 is about 73.5457934199.

Adding to 397808 its product of nonzero digits (12096), we get a palindrome (409904).

The spelling of 397808 in words is "three hundred ninety-seven thousand, eight hundred eight".