189780 has 24 divisors (see below), whose sum is σ = 531552. Its totient is φ = 50592.

The previous prime is 189767. The next prime is 189797. The reversal of 189780 is 87981.

189780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

189780 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1522 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (22148).

2¹⁸⁹⁷⁸⁰ is an apocalyptic number.

189780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189780 is an abundant number, since it is smaller than the sum of its proper divisors (341772).

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

189780 is a wasteful number, since it uses less digits than its factorization.

189780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175 (or 3173 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 189780 is about 435.6374639537. The cubic root of 189780 is about 57.4667734943.

It can be divided in two parts, 189 and 780, that added together give a palindrome (969).

The spelling of 189780 in words is "one hundred eighty-nine thousand, seven hundred eighty".