188128 has 12 divisors (see below), whose sum is σ = 370440. Its totient is φ = 94048.

The previous prime is 188107. The next prime is 188137. The reversal of 188128 is 821881.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 188096 and 188105.

It is a congruent number.

It is an unprimeable number.

188128 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 as a sum of consecutive naturals, namely, 2908 + ... + 2971.

It is an arithmetic number, because the mean of its divisors is an integer number (30870).

2¹⁸⁸¹²⁸ is an apocalyptic number.

It is an amenable number.

188128 is a deficient number, since it is larger than the sum of its proper divisors (182312).

188128 is an equidigital number, since it uses as much as digits as its factorization.

188128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5889 (or 5881 counting only the distinct ones).

The product of its digits is 1024, while the sum is 28.

The square root of 188128 is about 433.7372476512. The cubic root of 188128 is about 57.2995414116.

The spelling of 188128 in words is "one hundred eighty-eight thousand, one hundred twenty-eight".