397790685 has 24 divisors (see below), whose sum is σ = 701195040. Its totient is φ = 208557792.

The previous prime is 397790671. The next prime is 397790689. The reversal of 397790685 is 586097793.

It is not a de Polignac number, because 397790685 - 2¹⁰ = 397789661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397790689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72259 + ... + 77568.

It is an arithmetic number, because the mean of its divisors is an integer number (29216460).

Almost surely, 2^397790685 is an apocalyptic number.

It is an amenable number.

397790685 is a deficient number, since it is larger than the sum of its proper divisors (303404355).

397790685 is a wasteful number, since it uses less digits than its factorization.

397790685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149897 (or 149894 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 397790685 is about 19944.6906468865. The cubic root of 397790685 is about 735.4472635242.

The spelling of 397790685 in words is "three hundred ninety-seven million, seven hundred ninety thousand, six hundred eighty-five".