28879223 has 8 divisors (see below), whose sum is σ = 29700000. Its totient is φ = 28068768.

The previous prime is 28879217. The next prime is 28879229. The reversal of 28879223 is 32297882.

It is an interprime number because it is at equal distance from previous prime (28879217) and next prime (28879229).

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

It is a cyclic number.

It is not a de Polignac number, because 28879223 - 2⁶ = 28879159 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 (28879229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3278 + ... + 8276.

It is an arithmetic number, because the mean of its divisors is an integer number (3712500).

Almost surely, 2^28879223 is an apocalyptic number.

28879223 is a deficient number, since it is larger than the sum of its proper divisors (820777).

28879223 is a wasteful number, since it uses less digits than its factorization.

28879223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5161.

The product of its digits is 96768, while the sum is 41.

The square root of 28879223 is about 5373.9392441672. The cubic root of 28879223 is about 306.8045773588.

The spelling of 28879223 in words is "twenty-eight million, eight hundred seventy-nine thousand, two hundred twenty-three".