188728 has 16 divisors (see below), whose sum is σ = 365760. Its totient is φ = 91200.

The previous prime is 188719. The next prime is 188729. The reversal of 188728 is 827881.

188728 is nontrivially palindromic in base 7.

188728 is an undulating number in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 188693 and 188702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188729) 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, 133 + ... + 628.

It is an arithmetic number, because the mean of its divisors is an integer number (22860).

2¹⁸⁸⁷²⁸ is an apocalyptic number.

It is an amenable number.

188728 is a deficient number, since it is larger than the sum of its proper divisors (177032).

188728 is a wasteful number, since it uses less digits than its factorization.

188728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 794 counting only the distinct ones).

The product of its digits is 7168, while the sum is 34.

The square root of 188728 is about 434.4283600319. The cubic root of 188728 is about 57.3603922511.

The spelling of 188728 in words is "one hundred eighty-eight thousand, seven hundred twenty-eight".