28556423 has 4 divisors (see below), whose sum is σ = 32635920. Its totient is φ = 24476928.

The previous prime is 28556419. The next prime is 28556431. The reversal of 28556423 is 32465582.

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

It is not a de Polignac number, because 28556423 - 2² = 28556419 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 (28556443) 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, 2039738 + ... + 2039751.

It is an arithmetic number, because the mean of its divisors is an integer number (8158980).

Almost surely, 2^28556423 is an apocalyptic number.

28556423 is a deficient number, since it is larger than the sum of its proper divisors (4079497).

28556423 is an equidigital number, since it uses as much as digits as its factorization.

28556423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079496.

The product of its digits is 57600, while the sum is 35.

The square root of 28556423 is about 5343.8210112241. The cubic root of 28556423 is about 305.6571801156.

The spelling of 28556423 in words is "twenty-eight million, five hundred fifty-six thousand, four hundred twenty-three".