398885365764 has 36 divisors (see below), whose sum is σ = 1009114093260. Its totient is φ = 132853586880.

The previous prime is 398885365741. The next prime is 398885365817. The reversal of 398885365764 is 467563588893.

It is a happy number.

398885365764 is a `hidden beast` number, since 3 + 9 + 8 + 88 + 536 + 5 + 7 + 6 + 4 = 666.

398885365764 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 352073716164 + 46811649600 = 593358^2 + 216360^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 398885365692 and 398885365701.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4463547 + ... + 4552034.

It is an arithmetic number, because the mean of its divisors is an integer number (28030947035).

Almost surely, 2^398885365764 is an apocalyptic number.

It is an amenable number.

398885365764 is an abundant number, since it is smaller than the sum of its proper divisors (610228727496).

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

398885365764 is a wasteful number, since it uses less digits than its factorization.

398885365764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9016820 (or 9016815 counting only the distinct ones).

The product of its digits is 1045094400, while the sum is 72.

The spelling of 398885365764 in words is "three hundred ninety-eight billion, eight hundred eighty-five million, three hundred sixty-five thousand, seven hundred sixty-four".