28884223 has 4 divisors (see below), whose sum is σ = 28941480. Its totient is φ = 28826968.

The previous prime is 28884221. The next prime is 28884227. The reversal of 28884223 is 32248882.

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 28884223 - 2¹ = 28884221 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 (28884221) 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, 27865 + ... + 28882.

It is an arithmetic number, because the mean of its divisors is an integer number (7235370).

Almost surely, 2^28884223 is an apocalyptic number.

28884223 is a deficient number, since it is larger than the sum of its proper divisors (57257).

28884223 is an equidigital number, since it uses as much as digits as its factorization.

28884223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57256.

The product of its digits is 49152, while the sum is 37.

The square root of 28884223 is about 5374.4044321208. The cubic root of 28884223 is about 306.8222825254.

The spelling of 28884223 in words is "twenty-eight million, eight hundred eighty-four thousand, two hundred twenty-three".