189270 has 32 divisors (see below), whose sum is σ = 505440. Its totient is φ = 50400.

The previous prime is 189257. The next prime is 189271. The reversal of 189270 is 72981.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 189270.

It is not an unprimeable number, because it can be changed into a prime (189271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81 + ... + 620.

It is an arithmetic number, because the mean of its divisors is an integer number (15795).

2¹⁸⁹²⁷⁰ is an apocalyptic number.

189270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252720).

189270 is an abundant number, since it is smaller than the sum of its proper divisors (316170).

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

189270 is a wasteful number, since it uses less digits than its factorization.

189270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 189270 is about 435.0517210631. The cubic root of 189270 is about 57.4152500687.

The spelling of 189270 in words is "one hundred eighty-nine thousand, two hundred seventy".