189735870 has 16 divisors (see below), whose sum is σ = 455366160. Its totient is φ = 50596224.

The previous prime is 189735857. The next prime is 189735937. The reversal of 189735870 is 78537981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3162235 + ... + 3162294.

It is an arithmetic number, because the mean of its divisors is an integer number (28460385).

Almost surely, 2^189735870 is an apocalyptic number.

189735870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189735870 is an abundant number, since it is smaller than the sum of its proper divisors (265630290).

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

189735870 is a wasteful number, since it uses less digits than its factorization.

189735870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324539.

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 189735870 is about 13774.4644179002. The cubic root of 189735870 is about 574.6231885330.

The spelling of 189735870 in words is "one hundred eighty-nine million, seven hundred thirty-five thousand, eight hundred seventy".