398048840893 has 4 divisors (see below), whose sum is σ = 434235099168. Its totient is φ = 361862582620.

The previous prime is 398048840879. The next prime is 398048840923.

398048840893 is nontrivially palindromic in base 10.

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 de Polignac number, because none of the positive numbers 2^k-398048840893 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 (398048840803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18093129121 + ... + 18093129142.

It is an arithmetic number, because the mean of its divisors is an integer number (108558774792).

Almost surely, 2^398048840893 is an apocalyptic number.

It is an amenable number.

398048840893 is a deficient number, since it is larger than the sum of its proper divisors (36186258275).

398048840893 is a wasteful number, since it uses less digits than its factorization.

398048840893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36186258274.

The product of its (nonzero) digits is 47775744, while the sum is 64.

The spelling of 398048840893 in words is "three hundred ninety-eight billion, forty-eight million, eight hundred forty thousand, eight hundred ninety-three".