398478874893 has 16 divisors (see below), whose sum is σ = 579895680000. Its totient is φ = 241381496880.

The previous prime is 398478874819. The next prime is 398478874901.

It is a happy number.

398478874893 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 398478874893 - 2²⁸ = 398210439437 is a prime.

It is a super-2 number, since 2×398478874893² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398478874813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2954323 + ... + 3086256.

It is an arithmetic number, because the mean of its divisors is an integer number (36243480000).

Almost surely, 2^398478874893 is an apocalyptic number.

398478874893 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

398478874893 is a deficient number, since it is larger than the sum of its proper divisors (181416805107).

398478874893 is a wasteful number, since it uses less digits than its factorization.

398478874893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042592.

The product of its digits is 2341011456, while the sum is 78.

The spelling of 398478874893 in words is "three hundred ninety-eight billion, four hundred seventy-eight million, eight hundred seventy-four thousand, eight hundred ninety-three".