398976285717 has 14 divisors (see below), whose sum is σ = 598190783382. Its totient is φ = 265984189992.

The previous prime is 398976285703. The next prime is 398976285821. The reversal of 398976285717 is 717582679893.

398976285717 is a `hidden beast` number, since 398 + 97 + 6 + 2 + 85 + 71 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 377734389201 + 21241896516 = 614601^2 + 145746^2 .

It is not a de Polignac number, because 398976285717 - 2¹⁸ = 398976023573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398976295717) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 273645558 + ... + 273647015.

Almost surely, 2^398976285717 is an apocalyptic number.

It is an amenable number.

398976285717 is a deficient number, since it is larger than the sum of its proper divisors (199214497665).

398976285717 is an frugal number, since it uses more digits than its factorization.

398976285717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547292591 (or 547292576 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 72.

The spelling of 398976285717 in words is "three hundred ninety-eight billion, nine hundred seventy-six million, two hundred eighty-five thousand, seven hundred seventeen".