189309120 has 448 divisors, whose sum is σ = 811109376. Its totient is φ = 36126720.

The previous prime is 189309101. The next prime is 189309137. The reversal of 189309120 is 21903981.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 960862 + ... + 961058.

It is an arithmetic number, because the mean of its divisors is an integer number (1810512).

Almost surely, 2^189309120 is an apocalyptic number.

189309120 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 189309120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405554688).

189309120 is an abundant number, since it is smaller than the sum of its proper divisors (621800256).

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

189309120 is a wasteful number, since it uses less digits than its factorization.

189309120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 189309120 is about 13758.9650773596. The cubic root of 189309120 is about 574.1920549365.

The spelling of 189309120 in words is "one hundred eighty-nine million, three hundred nine thousand, one hundred twenty".