189838 has 8 divisors (see below), whose sum is σ = 310680. Its totient is φ = 86280.

The previous prime is 189823. The next prime is 189851. The reversal of 189838 is 838981.

It is a sphenic number, since it is the product of 3 distinct primes.

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 = 189797 and 189806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4293 + ... + 4336.

It is an arithmetic number, because the mean of its divisors is an integer number (38835).

2¹⁸⁹⁸³⁸ is an apocalyptic number.

189838 is a deficient number, since it is larger than the sum of its proper divisors (120842).

189838 is a wasteful number, since it uses less digits than its factorization.

189838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8642.

The product of its digits is 13824, while the sum is 37.

The square root of 189838 is about 435.7040279823. The cubic root of 189838 is about 57.4726271729.

It can be divided in two parts, 1898 and 38, that added together give a square (1936 = 44²).

The spelling of 189838 in words is "one hundred eighty-nine thousand, eight hundred thirty-eight".