28833239 has 2 divisors, whose sum is σ = 28833240. Its totient is φ = 28833238.

The previous prime is 28833229. The next prime is 28833253. The reversal of 28833239 is 93233882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28833239 - 2⁴ = 28833223 is a prime.

It is a super-2 number, since 2×28833239² = 1662711342462242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28833229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14416619 + 14416620.

It is an arithmetic number, because the mean of its divisors is an integer number (14416620).

Almost surely, 2^28833239 is an apocalyptic number.

28833239 is a deficient number, since it is larger than the sum of its proper divisors (1).

28833239 is an equidigital number, since it uses as much as digits as its factorization.

28833239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 28833239 is about 5369.6591139476. The cubic root of 28833239 is about 306.6416505796.

The spelling of 28833239 in words is "twenty-eight million, eight hundred thirty-three thousand, two hundred thirty-nine".