189388 has 12 divisors (see below), whose sum is σ = 335160. Its totient is φ = 93632.

The previous prime is 189377. The next prime is 189389. The reversal of 189388 is 883981.

It is not an unprimeable number, because it can be changed into a prime (189389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2¹⁸⁹³⁸⁸ is an apocalyptic number.

It is an amenable number.

189388 is a deficient number, since it is larger than the sum of its proper divisors (145772).

189388 is a wasteful number, since it uses less digits than its factorization.

189388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 534 counting only the distinct ones).

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

The square root of 189388 is about 435.1873159916. The cubic root of 189388 is about 57.4271793972.

The spelling of 189388 in words is "one hundred eighty-nine thousand, three hundred eighty-eight".