28949533 has 2 divisors, whose sum is σ = 28949534. Its totient is φ = 28949532.

The previous prime is 28949527. The next prime is 28949539. The reversal of 28949533 is 33594982.

It is a balanced prime because it is at equal distance from previous prime (28949527) and next prime (28949539).

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 5890329 = 4802^2 + 2427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28949533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28949533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28949539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14474766 + 14474767.

It is an arithmetic number, because the mean of its divisors is an integer number (14474767).

Almost surely, 2^28949533 is an apocalyptic number.

It is an amenable number.

28949533 is a deficient number, since it is larger than the sum of its proper divisors (1).

28949533 is an equidigital number, since it uses as much as digits as its factorization.

28949533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 28949533 is about 5380.4770234618. The cubic root of 28949533 is about 307.0533599914.

The spelling of 28949533 in words is "twenty-eight million, nine hundred forty-nine thousand, five hundred thirty-three".