397997488 has 40 divisors (see below), whose sum is σ = 882617120. Its totient is φ = 170311680.

The previous prime is 397997473. The next prime is 397997507. The reversal of 397997488 is 884799793.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 83818 + ... + 88438.

It is an arithmetic number, because the mean of its divisors is an integer number (22065428).

Almost surely, 2^397997488 is an apocalyptic number.

It is an amenable number.

397997488 is an abundant number, since it is smaller than the sum of its proper divisors (484619632).

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

397997488 is a wasteful number, since it uses less digits than its factorization.

397997488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5405 (or 5399 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 64.

The square root of 397997488 is about 19949.8743855694. The cubic root of 397997488 is about 735.5746892929.

The spelling of 397997488 in words is "three hundred ninety-seven million, nine hundred ninety-seven thousand, four hundred eighty-eight".