397690680 has 64 divisors (see below), whose sum is σ = 1213315200. Its totient is φ = 104251520.

The previous prime is 397690669. The next prime is 397690681. The reversal of 397690680 is 86096793.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397690681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21006 + ... + 35165.

It is an arithmetic number, because the mean of its divisors is an integer number (18958050).

Almost surely, 2^397690680 is an apocalyptic number.

397690680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397690680 is an abundant number, since it is smaller than the sum of its proper divisors (815624520).

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

397690680 is a wasteful number, since it uses less digits than its factorization.

397690680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56244 (or 56240 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 397690680 is about 19942.1834311090. The cubic root of 397690680 is about 735.3856276182.

The spelling of 397690680 in words is "three hundred ninety-seven million, six hundred ninety thousand, six hundred eighty".