28477223 has 4 divisors (see below), whose sum is σ = 29139528. Its totient is φ = 27814920.

The previous prime is 28477213. The next prime is 28477259. The reversal of 28477223 is 32277482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28477223 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 (28477213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331088 + ... + 331173.

It is an arithmetic number, because the mean of its divisors is an integer number (7284882).

Almost surely, 2^28477223 is an apocalyptic number.

28477223 is a deficient number, since it is larger than the sum of its proper divisors (662305).

28477223 is an equidigital number, since it uses as much as digits as its factorization.

28477223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662304.

The product of its digits is 37632, while the sum is 35.

The square root of 28477223 is about 5336.4054381203. The cubic root of 28477223 is about 305.3743428335.

The spelling of 28477223 in words is "twenty-eight million, four hundred seventy-seven thousand, two hundred twenty-three".