397127864 has 24 divisors (see below), whose sum is σ = 851307960. Its totient is φ = 170133744.

The previous prime is 397127851. The next prime is 397127869. The reversal of 397127864 is 468721793.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397127869) 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, 147797 + ... + 150459.

It is an arithmetic number, because the mean of its divisors is an integer number (35471165).

Almost surely, 2^397127864 is an apocalyptic number.

It is an amenable number.

397127864 is an abundant number, since it is smaller than the sum of its proper divisors (454180096).

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

397127864 is an frugal number, since it uses more digits than its factorization.

397127864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339 (or 2672 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The square root of 397127864 is about 19928.0672419580. The cubic root of 397127864 is about 735.0385553687.

The spelling of 397127864 in words is "three hundred ninety-seven million, one hundred twenty-seven thousand, eight hundred sixty-four".