397117527828 has 24 divisors (see below), whose sum is σ = 1058980074432. Its totient is φ = 113462150784.

The previous prime is 397117527817. The next prime is 397117527881. The reversal of 397117527828 is 828725711793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2363794725 + ... + 2363794892.

It is an arithmetic number, because the mean of its divisors is an integer number (44124169768).

Almost surely, 2^397117527828 is an apocalyptic number.

It is an amenable number.

397117527828 is an abundant number, since it is smaller than the sum of its proper divisors (661862546604).

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

397117527828 is a wasteful number, since it uses less digits than its factorization.

397117527828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727589631 (or 4727589629 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 60.

The spelling of 397117527828 in words is "three hundred ninety-seven billion, one hundred seventeen million, five hundred twenty-seven thousand, eight hundred twenty-eight".