189620 has 24 divisors (see below), whose sum is σ = 420000. Its totient is φ = 71712.

The previous prime is 189619. The next prime is 189643. The reversal of 189620 is 26981.

189620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 189620.

It is a congruent 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, 131 + ... + 629.

It is an arithmetic number, because the mean of its divisors is an integer number (17500).

2¹⁸⁹⁶²⁰ is an apocalyptic number.

189620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210000).

189620 is an abundant number, since it is smaller than the sum of its proper divisors (230380).

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

189620 is a wasteful number, since it uses less digits than its factorization.

189620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 189620 is about 435.4537862965. The cubic root of 189620 is about 57.4506192298.

The spelling of 189620 in words is "one hundred eighty-nine thousand, six hundred twenty".