398500189919 has 16 divisors (see below), whose sum is σ = 431560756704. Its totient is φ = 365787878400.

The previous prime is 398500189891. The next prime is 398500189963. The reversal of 398500189919 is 919981005893.

It is a cyclic number.

It is not a de Polignac number, because 398500189919 - 2²⁴ = 398483412703 is a prime.

It is a super-2 number, since 2×398500189919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398500129919) 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 15 ways as a sum of consecutive naturals, for example, 2072867 + ... + 2256939.

It is an arithmetic number, because the mean of its divisors is an integer number (26972547294).

Almost surely, 2^398500189919 is an apocalyptic number.

398500189919 is a deficient number, since it is larger than the sum of its proper divisors (33060566785).

398500189919 is a wasteful number, since it uses less digits than its factorization.

398500189919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185018.

The product of its (nonzero) digits is 6298560, while the sum is 62.

The spelling of 398500189919 in words is "three hundred ninety-eight billion, five hundred million, one hundred eighty-nine thousand, nine hundred nineteen".