398285995859 has 4 divisors (see below), whose sum is σ = 398295630240. Its totient is φ = 398276361480.

The previous prime is 398285995843. The next prime is 398285995927. The reversal of 398285995859 is 958599582893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958599582893 = 323599 ⋅2962307.

It is a cyclic number.

It is not a de Polignac number, because 398285995859 - 2⁴ = 398285995843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398285995259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4754912 + ... + 4837949.

It is an arithmetic number, because the mean of its divisors is an integer number (99573907560).

Almost surely, 2^398285995859 is an apocalyptic number.

398285995859 is a deficient number, since it is larger than the sum of its proper divisors (9634381).

398285995859 is an equidigital number, since it uses as much as digits as its factorization.

398285995859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9634380.

The product of its digits is 2519424000, while the sum is 80.

The spelling of 398285995859 in words is "three hundred ninety-eight billion, two hundred eighty-five million, nine hundred ninety-five thousand, eight hundred fifty-nine".