188842 has 4 divisors (see below), whose sum is σ = 283266. Its totient is φ = 94420.

The previous prime is 188833. The next prime is 188843. The reversal of 188842 is 248881.

188842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248881 = 19 ⋅13099.

It can be written as a sum of positive squares in only one way, i.e., 145161 + 43681 = 381^2 + 209^2 .

It is a super-2 number, since 2×188842² = 71322601928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (188843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47209 + ... + 47212.

2¹⁸⁸⁸⁴² is an apocalyptic number.

188842 is a deficient number, since it is larger than the sum of its proper divisors (94424).

188842 is an equidigital number, since it uses as much as digits as its factorization.

188842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94423.

The product of its digits is 4096, while the sum is 31.

The square root of 188842 is about 434.5595471279. The cubic root of 188842 is about 57.3719393250.

The spelling of 188842 in words is "one hundred eighty-eight thousand, eight hundred forty-two".