189830 has 16 divisors (see below), whose sum is σ = 350784. Its totient is φ = 73920.

The previous prime is 189823. The next prime is 189851. The reversal of 189830 is 38981.

189830 = T₇₅ + T₇₆ + ... + T₁₁₅.

It is a happy number.

189830 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 189793 and 189802.

It is a congruent number.

It is an unprimeable number.

189830 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, 179 + ... + 641.

It is an arithmetic number, because the mean of its divisors is an integer number (21924).

2¹⁸⁹⁸³⁰ is an apocalyptic number.

189830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189830 is a deficient number, since it is larger than the sum of its proper divisors (160954).

189830 is a wasteful number, since it uses less digits than its factorization.

189830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 189830 is about 435.6948473416. The cubic root of 189830 is about 57.4718198398.

The spelling of 189830 in words is "one hundred eighty-nine thousand, eight hundred thirty".