189181120 has 56 divisors (see below), whose sum is σ = 451713600. Its totient is φ = 75466752.

The previous prime is 189181103. The next prime is 189181121. The reversal of 189181120 is 21181981.

It is not an unprimeable number, because it can be changed into a prime (189181121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181561 + ... + 182599.

Almost surely, 2^189181120 is an apocalyptic number.

189181120 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 189181120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225856800).

189181120 is an abundant number, since it is smaller than the sum of its proper divisors (262532480).

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

189181120 is a wasteful number, since it uses less digits than its factorization.

189181120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 31.

The square root of 189181120 is about 13754.3127781798. The cubic root of 189181120 is about 574.0626138157.

The spelling of 189181120 in words is "one hundred eighty-nine million, one hundred eighty-one thousand, one hundred twenty".