398882242391 has 4 divisors (see below), whose sum is σ = 399770622000. Its totient is φ = 397993862784.

The previous prime is 398882242373. The next prime is 398882242397. The reversal of 398882242391 is 193242288893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193242288893 = 9437 ⋅20477089.

It is a cyclic number.

It is not a de Polignac number, because 398882242391 - 2⁶ = 398882242327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398882242391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398882242397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444189131 + ... + 444190028.

It is an arithmetic number, because the mean of its divisors is an integer number (99942655500).

Almost surely, 2^398882242391 is an apocalyptic number.

398882242391 is a deficient number, since it is larger than the sum of its proper divisors (888379609).

398882242391 is an equidigital number, since it uses as much as digits as its factorization.

398882242391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888379608.

The product of its digits is 11943936, while the sum is 59.

The spelling of 398882242391 in words is "three hundred ninety-eight billion, eight hundred eighty-two million, two hundred forty-two thousand, three hundred ninety-one".