398935661424 has 80 divisors (see below), whose sum is σ = 1064004280320. Its totient is φ = 128667651840.

The previous prime is 398935661419. The next prime is 398935661437. The reversal of 398935661424 is 424166539893.

398935661424 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

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, 10738209 + ... + 10775295.

It is an arithmetic number, because the mean of its divisors is an integer number (13300053504).

Almost surely, 2^398935661424 is an apocalyptic number.

It is an amenable number.

398935661424 is an abundant number, since it is smaller than the sum of its proper divisors (665068618896).

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

398935661424 is a wasteful number, since it uses less digits than its factorization.

398935661424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44358 (or 44352 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 60.

The spelling of 398935661424 in words is "three hundred ninety-eight billion, nine hundred thirty-five million, six hundred sixty-one thousand, four hundred twenty-four".