189427538344 has 64 divisors (see below), whose sum is σ = 404437587840. Its totient is φ = 82334165760.

The previous prime is 189427538329. The next prime is 189427538369. The reversal of 189427538344 is 443835724981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7429522 + ... + 7454974.

It is an arithmetic number, because the mean of its divisors is an integer number (6319337310).

Almost surely, 2^189427538344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189427538344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202218793920).

189427538344 is an abundant number, since it is smaller than the sum of its proper divisors (215010049496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189427538344 is a wasteful number, since it uses less digits than its factorization.

189427538344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29170 (or 29166 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 58.

The spelling of 189427538344 in words is "one hundred eighty-nine billion, four hundred twenty-seven million, five hundred thirty-eight thousand, three hundred forty-four".