397320658520 has 64 divisors (see below), whose sum is σ = 932930922240. Its totient is φ = 152003491200.

The previous prime is 397320658519. The next prime is 397320658583. The reversal of 397320658520 is 25856023793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16079375 + ... + 16104065.

It is an arithmetic number, because the mean of its divisors is an integer number (14577045660).

Almost surely, 2^397320658520 is an apocalyptic number.

It is an amenable number.

397320658520 is an abundant number, since it is smaller than the sum of its proper divisors (535610263720).

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

397320658520 is a wasteful number, since it uses less digits than its factorization.

397320658520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42216 (or 42212 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 397320658520 in words is "three hundred ninety-seven billion, three hundred twenty million, six hundred fifty-eight thousand, five hundred twenty".