397271268 has 18 divisors (see below), whose sum is σ = 1004213574. Its totient is φ = 132423744.

The previous prime is 397271267. The next prime is 397271269. The reversal of 397271268 is 862172793.

It is an interprime number because it is at equal distance from previous prime (397271267) and next prime (397271269).

It can be written as a sum of positive squares in only one way, i.e., 379782144 + 17489124 = 19488^2 + 4182^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (397271267) 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, 5517621 + ... + 5517692.

It is an arithmetic number, because the mean of its divisors is an integer number (55789643).

Almost surely, 2^397271268 is an apocalyptic number.

It is an amenable number.

397271268 is an abundant number, since it is smaller than the sum of its proper divisors (606942306).

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

397271268 is a wasteful number, since it uses less digits than its factorization.

397271268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11035323 (or 11035318 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 397271268 is about 19931.6649580510. The cubic root of 397271268 is about 735.1270195582.

The spelling of 397271268 in words is "three hundred ninety-seven million, two hundred seventy-one thousand, two hundred sixty-eight".