28867633 has 2 divisors, whose sum is σ = 28867634. Its totient is φ = 28867632.

The previous prime is 28867621. The next prime is 28867651. The reversal of 28867633 is 33676882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28643904 + 223729 = 5352^2 + 473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28867633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28867633.

It is not a weakly prime, because it can be changed into another prime (28867613) 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, 14433816 + 14433817.

It is an arithmetic number, because the mean of its divisors is an integer number (14433817).

Almost surely, 2^28867633 is an apocalyptic number.

It is an amenable number.

28867633 is a deficient number, since it is larger than the sum of its proper divisors (1).

28867633 is an equidigital number, since it uses as much as digits as its factorization.

28867633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 28867633 is about 5372.8607836050. The cubic root of 28867633 is about 306.7635289224.

Subtracting 28867633 from its reverse (33676882), we obtain a square (4809249 = 2193²).

The spelling of 28867633 in words is "twenty-eight million, eight hundred sixty-seven thousand, six hundred thirty-three".