398032316881 has 4 divisors (see below), whose sum is σ = 398034649600. Its totient is φ = 398029984164.

The previous prime is 398032316879. The next prime is 398032316971. The reversal of 398032316881 is 188613230893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 398032316881 - 2¹ = 398032316879 is a prime.

It is a super-2 number, since 2×398032316881² (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 (398032316281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 888321 + ... + 1259038.

It is an arithmetic number, because the mean of its divisors is an integer number (99508662400).

Almost surely, 2^398032316881 is an apocalyptic number.

It is an amenable number.

398032316881 is a deficient number, since it is larger than the sum of its proper divisors (2332719).

398032316881 is a wasteful number, since it uses less digits than its factorization.

398032316881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332718.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 398032316881 in words is "three hundred ninety-eight billion, thirty-two million, three hundred sixteen thousand, eight hundred eighty-one".