397099388 has 12 divisors (see below), whose sum is σ = 794198832. Its totient is φ = 170185440.

The previous prime is 397099387. The next prime is 397099403. The reversal of 397099388 is 883990793.

397099388 is an admirable number.

It is a super-3 number, since 3×397099388³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397099387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7091033 + ... + 7091088.

It is an arithmetic number, because the mean of its divisors is an integer number (66183236).

Almost surely, 2^397099388 is an apocalyptic number.

It is an amenable number.

397099388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

397099388 is a wasteful number, since it uses less digits than its factorization.

397099388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14182132 (or 14182130 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 397099388 is about 19927.3527594611. The cubic root of 397099388 is about 735.0209863352.

The spelling of 397099388 in words is "three hundred ninety-seven million, ninety-nine thousand, three hundred eighty-eight".