398226787622893 has 4 divisors (see below), whose sum is σ = 398228728154620. Its totient is φ = 398224847091168.

The previous prime is 398226787622831. The next prime is 398226787622899.

398226787622893 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301370051360169 + 96856736262724 = 17360013^2 + 9841582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398226787622893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398226787622899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969958008 + ... + 970368481.

It is an arithmetic number, because the mean of its divisors is an integer number (99557182038655).

Almost surely, 2^{398226787622893} is an apocalyptic number.

It is an amenable number.

398226787622893 is a deficient number, since it is larger than the sum of its proper divisors (1940531727).

398226787622893 is a wasteful number, since it uses less digits than its factorization.

398226787622893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940531726.

The product of its digits is 10534551552, while the sum is 82.

The spelling of 398226787622893 in words is "three hundred ninety-eight trillion, two hundred twenty-six billion, seven hundred eighty-seven million, six hundred twenty-two thousand, eight hundred ninety-three".