397561828 has 12 divisors (see below), whose sum is σ = 696568320. Its totient is φ = 198542312.

The previous prime is 397561819. The next prime is 397561849. The reversal of 397561828 is 828165793.

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 3 ways as a sum of consecutive naturals, for example, 55876 + ... + 62587.

It is an arithmetic number, because the mean of its divisors is an integer number (58047360).

Almost surely, 2^397561828 is an apocalyptic number.

It is an amenable number.

397561828 is a deficient number, since it is larger than the sum of its proper divisors (299006492).

397561828 is a wasteful number, since it uses less digits than its factorization.

397561828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119306 (or 119304 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The square root of 397561828 is about 19938.9525301607. The cubic root of 397561828 is about 735.3061972559.

The spelling of 397561828 in words is "three hundred ninety-seven million, five hundred sixty-one thousand, eight hundred twenty-eight".