28255823 has 4 divisors (see below), whose sum is σ = 28368648. Its totient is φ = 28143000.

The previous prime is 28255807. The next prime is 28255841. The reversal of 28255823 is 32855282.

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

It is a cyclic number.

It is not a de Polignac number, because 28255823 - 2⁴ = 28255807 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 (28255873) 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, 56036 + ... + 56537.

It is an arithmetic number, because the mean of its divisors is an integer number (7092162).

Almost surely, 2^28255823 is an apocalyptic number.

28255823 is a deficient number, since it is larger than the sum of its proper divisors (112825).

28255823 is a wasteful number, since it uses less digits than its factorization.

28255823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112824.

The product of its digits is 38400, while the sum is 35.

The square root of 28255823 is about 5315.6206599042. The cubic root of 28255823 is about 304.5808917039.

The spelling of 28255823 in words is "twenty-eight million, two hundred fifty-five thousand, eight hundred twenty-three".