398188881893 has 8 divisors (see below), whose sum is σ = 437558587200. Its totient is φ = 359347629280.

The previous prime is 398188881869. The next prime is 398188881899.

It is a happy number.

398188881893 is nontrivially palindromic in base 10.

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 398188881893 - 2⁶ = 398188881829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398188881893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398188881899) 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, 132111593 + ... + 132114606.

It is an arithmetic number, because the mean of its divisors is an integer number (54694823400).

Almost surely, 2^398188881893 is an apocalyptic number.

It is an amenable number.

398188881893 is a deficient number, since it is larger than the sum of its proper divisors (39369705307).

398188881893 is a wasteful number, since it uses less digits than its factorization.

398188881893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264226347.

The product of its digits is 191102976, while the sum is 74.

The spelling of 398188881893 in words is "three hundred ninety-eight billion, one hundred eighty-eight million, eight hundred eighty-one thousand, eight hundred ninety-three".