397916456 has 24 divisors (see below), whose sum is σ = 867905370. Its totient is φ = 170535456.

The previous prime is 397916423. The next prime is 397916459. The reversal of 397916456 is 654619793.

It can be written as a sum of positive squares in only one way, i.e., 367335556 + 30580900 = 19166^2 + 5530^2 .

It is not an unprimeable number, because it can be changed into a prime (397916459) 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 5 ways as a sum of consecutive naturals, for example, 507155 + ... + 507938.

Almost surely, 2^397916456 is an apocalyptic number.

It is an amenable number.

397916456 is an abundant number, since it is smaller than the sum of its proper divisors (469988914).

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

397916456 is a wasteful number, since it uses less digits than its factorization.

397916456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015113 (or 1015102 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 50.

The square root of 397916456 is about 19947.8433922066. The cubic root of 397916456 is about 735.5247650801.

The spelling of 397916456 in words is "three hundred ninety-seven million, nine hundred sixteen thousand, four hundred fifty-six".