28233223 has 2 divisors, whose sum is σ = 28233224. Its totient is φ = 28233222.

The previous prime is 28233217. The next prime is 28233299. The reversal of 28233223 is 32233282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28233223 - 2¹³ = 28225031 is a prime.

It is a super-2 number, since 2×28233223² = 1594229761935458, which contains 22 as substring.

It is equal to p_1755043 and since 28233223 and 1755043 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28233823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14116611 + 14116612.

It is an arithmetic number, because the mean of its divisors is an integer number (14116612).

Almost surely, 2^28233223 is an apocalyptic number.

28233223 is a deficient number, since it is larger than the sum of its proper divisors (1).

28233223 is an equidigital number, since it uses as much as digits as its factorization.

28233223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 25.

The square root of 28233223 is about 5313.4944245760. The cubic root of 28233223 is about 304.4996652112.

The spelling of 28233223 in words is "twenty-eight million, two hundred thirty-three thousand, two hundred twenty-three".