189121110 has 32 divisors (see below), whose sum is σ = 464964192. Its totient is φ = 49201920.

The previous prime is 189121103. The next prime is 189121123. The reversal of 189121110 is 11121981.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 75649 + ... + 78108.

It is an arithmetic number, because the mean of its divisors is an integer number (14530131).

Almost surely, 2^189121110 is an apocalyptic number.

189121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189121110 is an abundant number, since it is smaller than the sum of its proper divisors (275843082).

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

189121110 is a wasteful number, since it uses less digits than its factorization.

189121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153808.

The product of its (nonzero) digits is 144, while the sum is 24.

The square root of 189121110 is about 13752.1311075775. The cubic root of 189121110 is about 574.0019080740.

The spelling of 189121110 in words is "one hundred eighty-nine million, one hundred twenty-one thousand, one hundred ten".