28671223 has 12 divisors (see below), whose sum is σ = 33603552. Its totient is φ = 24390240.

The previous prime is 28671217. The next prime is 28671229. The reversal of 28671223 is 32217682.

It is an interprime number because it is at equal distance from previous prime (28671217) and next prime (28671229).

It is not a de Polignac number, because 28671223 - 2⁵ = 28671191 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 (28671229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4578 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (2800296).

Almost surely, 2^28671223 is an apocalyptic number.

28671223 is a deficient number, since it is larger than the sum of its proper divisors (4932329).

28671223 is a wasteful number, since it uses less digits than its factorization.

28671223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422 (or 4415 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 28671223 is about 5354.5516152149. The cubic root of 28671223 is about 306.0662244353.

The spelling of 28671223 in words is "twenty-eight million, six hundred seventy-one thousand, two hundred twenty-three".