398887960681 has 8 divisors (see below), whose sum is σ = 455876489664. Its totient is φ = 341900565360.

The previous prime is 398887960673. The next prime is 398887960693. The reversal of 398887960681 is 186069788893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398887960681 - 2³ = 398887960673 is a prime.

It is a super-2 number, since 2×398887960681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398887960631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696411 + ... + 1132591.

It is an arithmetic number, because the mean of its divisors is an integer number (56984561208).

Almost surely, 2^398887960681 is an apocalyptic number.

It is an amenable number.

398887960681 is a deficient number, since it is larger than the sum of its proper divisors (56988528983).

398887960681 is a wasteful number, since it uses less digits than its factorization.

398887960681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566831.

The product of its (nonzero) digits is 250822656, while the sum is 73.

The spelling of 398887960681 in words is "three hundred ninety-eight billion, eight hundred eighty-seven million, nine hundred sixty thousand, six hundred eighty-one".