398568319728 has 40 divisors (see below), whose sum is σ = 1049061904848. Its totient is φ = 130349386752.

The previous prime is 398568319673. The next prime is 398568319739. The reversal of 398568319728 is 827913865893.

It is a happy number.

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, 78332425 + ... + 78337512.

Almost surely, 2^398568319728 is an apocalyptic number.

It is an amenable number.

398568319728 is an abundant number, since it is smaller than the sum of its proper divisors (650493585120).

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

398568319728 is a wasteful number, since it uses less digits than its factorization.

398568319728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156670001 (or 156669995 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 69.

The spelling of 398568319728 in words is "three hundred ninety-eight billion, five hundred sixty-eight million, three hundred nineteen thousand, seven hundred twenty-eight".