28223873 has 16 divisors (see below), whose sum is σ = 31012800. Its totient is φ = 25583040.

The previous prime is 28223869. The next prime is 28223887. The reversal of 28223873 is 37832282.

It is a cyclic number.

It is not a de Polignac number, because 28223873 - 2² = 28223869 is a prime.

It is a Duffinian number.

Its product of digits (32256) is a multiple of the sum of its prime divisors (512).

It is not an unprimeable number, because it can be changed into a prime (28223813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99590 + ... + 99872.

It is an arithmetic number, because the mean of its divisors is an integer number (1938300).

Almost surely, 2^28223873 is an apocalyptic number.

It is an amenable number.

28223873 is a deficient number, since it is larger than the sum of its proper divisors (2788927).

28223873 is a wasteful number, since it uses less digits than its factorization.

28223873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 32256, while the sum is 35.

The square root of 28223873 is about 5312.6145164128. The cubic root of 28223873 is about 304.4660477691.

The spelling of 28223873 in words is "twenty-eight million, two hundred twenty-three thousand, eight hundred seventy-three".