397709064 has 96 divisors (see below), whose sum is σ = 1160359200. Its totient is φ = 122653440.

The previous prime is 397709051. The next prime is 397709069. The reversal of 397709064 is 460907793.

It is not an unprimeable number, because it can be changed into a prime (397709069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55444 + ... + 62204.

It is an arithmetic number, because the mean of its divisors is an integer number (12087075).

Almost surely, 2^397709064 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 397709064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580179600).

397709064 is an abundant number, since it is smaller than the sum of its proper divisors (762650136).

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

397709064 is a wasteful number, since it uses less digits than its factorization.

397709064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6835 (or 6828 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 397709064 is about 19942.6443582590. The cubic root of 397709064 is about 735.3969589717.

The spelling of 397709064 in words is "three hundred ninety-seven million, seven hundred nine thousand, sixty-four".