189305870 has 32 divisors (see below), whose sum is σ = 382923072. Its totient is φ = 66857472.

The previous prime is 189305869. The next prime is 189305891. The reversal of 189305870 is 78503981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28667 + ... + 34646.

It is an arithmetic number, because the mean of its divisors is an integer number (11966346).

Almost surely, 2^189305870 is an apocalyptic number.

189305870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189305870 is an abundant number, since it is smaller than the sum of its proper divisors (193617202).

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

189305870 is a wasteful number, since it uses less digits than its factorization.

189305870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63356.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 189305870 is about 13758.8469720395. The cubic root of 189305870 is about 574.1887690676.

The spelling of 189305870 in words is "one hundred eighty-nine million, three hundred five thousand, eight hundred seventy".