398919582794 has 4 divisors (see below), whose sum is σ = 598379374194. Its totient is φ = 199459791396.

The previous prime is 398919582791. The next prime is 398919582811. The reversal of 398919582794 is 497285919893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497285919893 = 7 ⋅71040845699.

It can be written as a sum of positive squares in only one way, i.e., 333636777769 + 65282805025 = 577613^2 + 255505^2 .

It is not an unprimeable number, because it can be changed into a prime (398919582791) 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 as a sum of consecutive naturals, namely, 99729895697 + ... + 99729895700.

Almost surely, 2^398919582794 is an apocalyptic number.

398919582794 is a deficient number, since it is larger than the sum of its proper divisors (199459791400).

398919582794 is a wasteful number, since it uses less digits than its factorization.

398919582794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199459791399.

The product of its digits is 352719360, while the sum is 74.

The spelling of 398919582794 in words is "three hundred ninety-eight billion, nine hundred nineteen million, five hundred eighty-two thousand, seven hundred ninety-four".