397894456 has 8 divisors (see below), whose sum is σ = 746052120. Its totient is φ = 198947224.

The previous prime is 397894439. The next prime is 397894477. The reversal of 397894456 is 654498793.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 397894397 and 397894406.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 24868396 + ... + 24868411.

It is an arithmetic number, because the mean of its divisors is an integer number (93256515).

Almost surely, 2^397894456 is an apocalyptic number.

It is an amenable number.

397894456 is a deficient number, since it is larger than the sum of its proper divisors (348157664).

397894456 is a wasteful number, since it uses less digits than its factorization.

397894456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49736813 (or 49736809 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The square root of 397894456 is about 19947.2919465275. The cubic root of 397894456 is about 735.5112096023.

The spelling of 397894456 in words is "three hundred ninety-seven million, eight hundred ninety-four thousand, four hundred fifty-six".