397967808 has 112 divisors (see below), whose sum is σ = 1228140800. Its totient is φ = 113686272.

The previous prime is 397967767. The next prime is 397967809. The reversal of 397967808 is 808769793.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397967809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62835 + ... + 68877.

Almost surely, 2^397967808 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 397967808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614070400).

397967808 is an abundant number, since it is smaller than the sum of its proper divisors (830172992).

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

397967808 is an equidigital number, since it uses as much as digits as its factorization.

397967808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6079 (or 6055 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 397967808 is about 19949.1305073680. The cubic root of 397967808 is about 735.5564040858.

The spelling of 397967808 in words is "three hundred ninety-seven million, nine hundred sixty-seven thousand, eight hundred eight".