397769856 has 64 divisors (see below), whose sum is σ = 1152640800. Its totient is φ = 120535040.

The previous prime is 397769849. The next prime is 397769857. The reversal of 397769856 is 658967793.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 397769856.

It is not an unprimeable number, because it can be changed into a prime (397769857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42861 + ... + 51308.

Almost surely, 2^397769856 is an apocalyptic number.

It is an amenable number.

397769856 is an abundant number, since it is smaller than the sum of its proper divisors (754870944).

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

397769856 is a wasteful number, since it uses less digits than its factorization.

397769856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94197 (or 94185 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 60.

The square root of 397769856 is about 19944.1684710093. The cubic root of 397769856 is about 735.4344268750.

The spelling of 397769856 in words is "three hundred ninety-seven million, seven hundred sixty-nine thousand, eight hundred fifty-six".