189770 has 16 divisors (see below), whose sum is σ = 390528. Its totient is φ = 65040.

The previous prime is 189767. The next prime is 189797. The reversal of 189770 is 77981.

189770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (24408).

2¹⁸⁹⁷⁷⁰ is an apocalyptic number.

189770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189770 is an abundant number, since it is smaller than the sum of its proper divisors (200758).

It is a weird number, because it is abundant, but not a pseudoperfect number.

189770 is a wasteful number, since it uses less digits than its factorization.

189770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 189770 is about 435.6259863690. The cubic root of 189770 is about 57.4657641188.

It can be divided in two parts, 189 and 770, that multiplied together give a triangular number (145530 = T₅₃₉).

The spelling of 189770 in words is "one hundred eighty-nine thousand, seven hundred seventy".