28633223 has 2 divisors, whose sum is σ = 28633224. Its totient is φ = 28633222.

The previous prime is 28633147. The next prime is 28633249. The reversal of 28633223 is 32233682.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28633223 is a prime.

It is a super-2 number, since 2×28633223² = 1639722918735458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28633823) 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 as a sum of consecutive naturals, namely, 14316611 + 14316612.

It is an arithmetic number, because the mean of its divisors is an integer number (14316612).

Almost surely, 2^28633223 is an apocalyptic number.

28633223 is a deficient number, since it is larger than the sum of its proper divisors (1).

28633223 is an equidigital number, since it uses as much as digits as its factorization.

28633223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 29.

The square root of 28633223 is about 5351.0020556901. The cubic root of 28633223 is about 305.9309475810.

The spelling of 28633223 in words is "twenty-eight million, six hundred thirty-three thousand, two hundred twenty-three".