28612 has 12 divisors (see below), whose sum is σ = 52416. Its totient is φ = 13640.

The previous prime is 28607. The next prime is 28619. The reversal of 28612 is 21682.

It is a happy number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 28612.

It is not an unprimeable number, because it can be changed into a prime (28619) by changing a digit.

28612 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 3 ways as a sum of consecutive naturals, for example, 64 + ... + 247.

It is an arithmetic number, because the mean of its divisors is an integer number (4368).

2²⁸⁶¹² is an apocalyptic number.

It is an amenable number.

28612 is a deficient number, since it is larger than the sum of its proper divisors (23804).

28612 is a wasteful number, since it uses less digits than its factorization.

28612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 336 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 28612 is about 169.1508202759. The cubic root of 28612 is about 30.5855343363.

The spelling of 28612 in words is "twenty-eight thousand, six hundred twelve".