189445320 has 96 divisors (see below), whose sum is σ = 627377400. Its totient is φ = 49560576.

The previous prime is 189445261. The next prime is 189445327. The reversal of 189445320 is 23544981.

189445320 is a `hidden beast` number, since 1 + 89 + 44 + 532 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 145009764 + 44435556 = 12042^2 + 6666^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (189445327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14116 + ... + 24044.

Almost surely, 2^189445320 is an apocalyptic number.

189445320 is a gapful number since it is divisible by the number (10) 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 189445320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313688700).

189445320 is an abundant number, since it is smaller than the sum of its proper divisors (437932080).

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

189445320 is a wasteful number, since it uses less digits than its factorization.

189445320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999 (or 9992 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 189445320 is about 13763.9136876108. The cubic root of 189445320 is about 574.3297243214.

The spelling of 189445320 in words is "one hundred eighty-nine million, four hundred forty-five thousand, three hundred twenty".