398935986520 has 64 divisors (see below), whose sum is σ = 904365745920. Its totient is φ = 158375378304.

The previous prime is 398935986509. The next prime is 398935986577. The reversal of 398935986520 is 25689539893.

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, 4697959 + ... + 4782121.

It is an arithmetic number, because the mean of its divisors is an integer number (14130714780).

Almost surely, 2^398935986520 is an apocalyptic number.

It is an amenable number.

398935986520 is an abundant number, since it is smaller than the sum of its proper divisors (505429759400).

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

398935986520 is a wasteful number, since it uses less digits than its factorization.

398935986520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85064 (or 85060 counting only the distinct ones).

The product of its (nonzero) digits is 125971200, while the sum is 67.

The spelling of 398935986520 in words is "three hundred ninety-eight billion, nine hundred thirty-five million, nine hundred eighty-six thousand, five hundred twenty".