398998638543 has 8 divisors (see below), whose sum is σ = 532031212800. Its totient is φ = 265982578328.

The previous prime is 398998638529. The next prime is 398998638557. The reversal of 398998638543 is 345836899893.

It is an interprime number because it is at equal distance from previous prime (398998638529) and next prime (398998638557).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398998638543 - 2²⁰ = 398997589967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398998638583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4072023 + ... + 4168856.

It is an arithmetic number, because the mean of its divisors is an integer number (66503901600).

Almost surely, 2^398998638543 is an apocalyptic number.

398998638543 is a deficient number, since it is larger than the sum of its proper divisors (133032574257).

398998638543 is a wasteful number, since it uses less digits than its factorization.

398998638543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257021.

The product of its digits is 1209323520, while the sum is 75.

The spelling of 398998638543 in words is "three hundred ninety-eight billion, nine hundred ninety-eight million, six hundred thirty-eight thousand, five hundred forty-three".