397685574 has 48 divisors (see below), whose sum is σ = 1012297104. Its totient is φ = 111240000.

The previous prime is 397685569. The next prime is 397685579. The reversal of 397685574 is 475586793.

397685574 is a `hidden beast` number, since 3 + 9 + 7 + 68 + 5 + 574 = 666.

It is an interprime number because it is at equal distance from previous prime (397685569) and next prime (397685579).

It is a self number, because there is not a number n which added to its sum of digits gives 397685574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397685579) 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, 74677 + ... + 79824.

It is an arithmetic number, because the mean of its divisors is an integer number (21089523).

Almost surely, 2^397685574 is an apocalyptic number.

397685574 is an abundant number, since it is smaller than the sum of its proper divisors (614611530).

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

397685574 is a wasteful number, since it uses less digits than its factorization.

397685574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154533 (or 154530 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The square root of 397685574 is about 19942.0554106140. The cubic root of 397685574 is about 735.3824803689.

The spelling of 397685574 in words is "three hundred ninety-seven million, six hundred eighty-five thousand, five hundred seventy-four".