397693604 has 108 divisors (see below), whose sum is σ = 913813740. Its totient is φ = 150796800.

The previous prime is 397693591. The next prime is 397693607. The reversal of 397693604 is 406396793.

It can be written as a sum of positive squares in 2 ways, for example, as 183656704 + 214036900 = 13552^2 + 14630^2 .

It is not an unprimeable number, because it can be changed into a prime (397693607) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 972152 + ... + 972560.

Almost surely, 2^397693604 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 397693604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456906870).

397693604 is an abundant number, since it is smaller than the sum of its proper divisors (516120136).

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

397693604 is a wasteful number, since it uses less digits than its factorization.

397693604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 397693604 is about 19942.2567429065. The cubic root of 397693604 is about 735.3874299086.

The spelling of 397693604 in words is "three hundred ninety-seven million, six hundred ninety-three thousand, six hundred four".