188028 has 24 divisors (see below), whose sum is σ = 487760. Its totient is φ = 62640.

The previous prime is 188021. The next prime is 188029. The reversal of 188028 is 820881.

188028 is nontrivially palindromic in base 15.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 187992 and 188010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188021) by changing a digit.

188028 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 in 7 ways as a sum of consecutive naturals, for example, 763 + ... + 978.

2¹⁸⁸⁰²⁸ is an apocalyptic number.

188028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

188028 is an abundant number, since it is smaller than the sum of its proper divisors (299732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

188028 is a wasteful number, since it uses less digits than its factorization.

188028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 188028 is about 433.6219551637. The cubic root of 188028 is about 57.2893870314.

The spelling of 188028 in words is "one hundred eighty-eight thousand, twenty-eight".