398682376569 has 15 divisors (see below), whose sum is σ = 595571051647. Its totient is φ = 265784462568.

The previous prime is 398682376501. The next prime is 398682376591. The reversal of 398682376569 is 965673286893.

The square root of 398682376569 is 631413.

It is a perfect power (a square), and thus also a powerful number.

398682376569 is a `hidden beast` number, since 39 + 8 + 6 + 8 + 23 + 7 + 6 + 569 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61367675625 + 337314700944 = 247725^2 + 580788^2 .

It is not a de Polignac number, because 398682376569 - 2¹¹ = 398682374521 is a prime.

It is a super-2 number, since 2×398682376569² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398682376497 and 398682376506.

It is not an unprimeable number, because it can be changed into a prime (398682376369) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5647639 + ... + 5717795.

Almost surely, 2^398682376569 is an apocalyptic number.

398682376569 is the 631413-rd square number.

398682376569 is the 315707-th centered octagonal number.

It is an amenable number.

398682376569 is a deficient number, since it is larger than the sum of its proper divisors (196888675078).

398682376569 is an frugal number, since it uses more digits than its factorization.

398682376569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140326 (or 70160 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 72.

The spelling of 398682376569 in words is "three hundred ninety-eight billion, six hundred eighty-two million, three hundred seventy-six thousand, five hundred sixty-nine".