189347328 has 80 divisors (see below), whose sum is σ = 560522160. Its totient is φ = 63111168.

The previous prime is 189347317. The next prime is 189347363. The reversal of 189347328 is 823743981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6976 + ... + 20672.

It is an arithmetic number, because the mean of its divisors is an integer number (7006527).

Almost surely, 2^189347328 is an apocalyptic number.

189347328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189347328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280261080).

189347328 is an abundant number, since it is smaller than the sum of its proper divisors (371174832).

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

189347328 is an equidigital number, since it uses as much as digits as its factorization.

189347328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13724 (or 13702 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 189347328 is about 13760.3534838317. The cubic root of 189347328 is about 574.2306818029.

It can be divided in two parts, 18934 and 7328, that added together give a palindrome (26262).

The spelling of 189347328 in words is "one hundred eighty-nine million, three hundred forty-seven thousand, three hundred twenty-eight".