28634 has 8 divisors (see below), whose sum is σ = 43680. Its totient is φ = 14076.

The previous prime is 28631. The next prime is 28643. The reversal of 28634 is 43682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 275.

It is an arithmetic number, because the mean of its divisors is an integer number (5460).

2²⁸⁶³⁴ is an apocalyptic number.

28634 is a deficient number, since it is larger than the sum of its proper divisors (15046).

28634 is a wasteful number, since it uses less digits than its factorization.

28634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244.

The product of its digits is 1152, while the sum is 23.

The square root of 28634 is about 169.2158385022. The cubic root of 28634 is about 30.5933714835.

The spelling of 28634 in words is "twenty-eight thousand, six hundred thirty-four".