189445080 has 64 divisors (see below), whose sum is σ = 620006400. Its totient is φ = 45925760.

The previous prime is 189445073. The next prime is 189445097. The reversal of 189445080 is 80544981.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70440 + ... + 73079.

It is an arithmetic number, because the mean of its divisors is an integer number (9687600).

Almost surely, 2^189445080 is an apocalyptic number.

189445080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189445080 is an abundant number, since it is smaller than the sum of its proper divisors (430561320).

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

189445080 is a wasteful number, since it uses less digits than its factorization.

189445080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143544 (or 143540 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 189445080 is about 13763.9049691576. The cubic root of 189445080 is about 574.3294817902.

The spelling of 189445080 in words is "one hundred eighty-nine million, four hundred forty-five thousand, eighty".