28101 has 16 divisors (see below), whose sum is σ = 43200. Its totient is φ = 16128.

The previous prime is 28099. The next prime is 28109. The reversal of 28101 is 10182.

It is a happy number.

It is not a de Polignac number, because 28101 - 2¹ = 28099 is a prime.

28101 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28101.

It is not an unprimeable number, because it can be changed into a prime (28109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (2700).

2²⁸¹⁰¹ is an apocalyptic number.

It is an amenable number.

28101 is a deficient number, since it is larger than the sum of its proper divisors (15099).

28101 is a wasteful number, since it uses less digits than its factorization.

28101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 28101 is about 167.6335288658. The cubic root of 28101 is about 30.4023572733.

Adding to 28101 its reverse (10182), we get a palindrome (38283).

The spelling of 28101 in words is "twenty-eight thousand, one hundred one".