397731544 has 16 divisors (see below), whose sum is σ = 852282000. Its totient is φ = 170456352.

The previous prime is 397731527. The next prime is 397731547. The reversal of 397731544 is 445137793.

It is a self number, because there is not a number n which added to its sum of digits gives 397731544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397731547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551119 + ... + 3551230.

It is an arithmetic number, because the mean of its divisors is an integer number (53267625).

Almost surely, 2^397731544 is an apocalyptic number.

It is an amenable number.

397731544 is an abundant number, since it is smaller than the sum of its proper divisors (454550456).

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

397731544 is a wasteful number, since it uses less digits than its factorization.

397731544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102362 (or 7102358 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The square root of 397731544 is about 19943.2079666236. The cubic root of 397731544 is about 735.4108145038.

The spelling of 397731544 in words is "three hundred ninety-seven million, seven hundred thirty-one thousand, five hundred forty-four".