28134223 has 4 divisors (see below), whose sum is σ = 30298408. Its totient is φ = 25970040.

The previous prime is 28134217. The next prime is 28134251. The reversal of 28134223 is 32243182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28134223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28134283) 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, 1082073 + ... + 1082098.

It is an arithmetic number, because the mean of its divisors is an integer number (7574602).

Almost surely, 2^28134223 is an apocalyptic number.

28134223 is a deficient number, since it is larger than the sum of its proper divisors (2164185).

28134223 is a wasteful number, since it uses less digits than its factorization.

28134223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164184.

The product of its digits is 2304, while the sum is 25.

The square root of 28134223 is about 5304.1703404020. The cubic root of 28134223 is about 304.1433383080.

The spelling of 28134223 in words is "twenty-eight million, one hundred thirty-four thousand, two hundred twenty-three".