398639720088 has 24 divisors (see below), whose sum is σ = 1079649242100. Its totient is φ = 132879906672.

The previous prime is 398639720071. The next prime is 398639720113. The reversal of 398639720088 is 880027936893.

398639720088 is a `hidden beast` number, since 39 + 8 + 6 + 397 + 200 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2768331318 + ... + 2768331461.

Almost surely, 2^398639720088 is an apocalyptic number.

It is an amenable number.

398639720088 is an abundant number, since it is smaller than the sum of its proper divisors (681009522012).

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

398639720088 is a wasteful number, since it uses less digits than its factorization.

398639720088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536662791 (or 5536662784 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 398639720088 in words is "three hundred ninety-eight billion, six hundred thirty-nine million, seven hundred twenty thousand, eighty-eight".