188845 has 8 divisors (see below), whose sum is σ = 228960. Its totient is φ = 149520.

The previous prime is 188843. The next prime is 188857. The reversal of 188845 is 548881.

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

It is not a de Polignac number, because 188845 - 2¹ = 188843 is a prime.

188845 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 188845.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 790 + ... + 1000.

It is an arithmetic number, because the mean of its divisors is an integer number (28620).

2¹⁸⁸⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

188845 is a deficient number, since it is larger than the sum of its proper divisors (40115).

188845 is a wasteful number, since it uses less digits than its factorization.

188845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its digits is 10240, while the sum is 34.

The square root of 188845 is about 434.5629988851. The cubic root of 188845 is about 57.3722431326.

The spelling of 188845 in words is "one hundred eighty-eight thousand, eight hundred forty-five".