28089833 has 2 divisors, whose sum is σ = 28089834. Its totient is φ = 28089832.

The previous prime is 28089821. The next prime is 28089857. The reversal of 28089833 is 33898082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28015849 + 73984 = 5293^2 + 272^2 .

It is a cyclic number.

It is not a de Polignac number, because 28089833 - 2⁶ = 28089769 is a prime.

It is not a weakly prime, because it can be changed into another prime (28089863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14044916 + 14044917.

It is an arithmetic number, because the mean of its divisors is an integer number (14044917).

Almost surely, 2^28089833 is an apocalyptic number.

It is an amenable number.

28089833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28089833 is an equidigital number, since it uses as much as digits as its factorization.

28089833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 28089833 is about 5299.9842452596. The cubic root of 28089833 is about 303.9832956253.

The spelling of 28089833 in words is "twenty-eight million, eighty-nine thousand, eight hundred thirty-three".