28869433 has 2 divisors, whose sum is σ = 28869434. Its totient is φ = 28869432.

The previous prime is 28869403. The next prime is 28869437. The reversal of 28869433 is 33496882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26347689 + 2521744 = 5133^2 + 1588^2 .

It is a cyclic number.

It is not a de Polignac number, because 28869433 - 2¹³ = 28861241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28869433.

It is not a weakly prime, because it can be changed into another prime (28869437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14434716 + 14434717.

It is an arithmetic number, because the mean of its divisors is an integer number (14434717).

Almost surely, 2^28869433 is an apocalyptic number.

It is an amenable number.

28869433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28869433 is an equidigital number, since it uses as much as digits as its factorization.

28869433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 28869433 is about 5373.0282895217. The cubic root of 28869433 is about 306.7699047237.

The spelling of 28869433 in words is "twenty-eight million, eight hundred sixty-nine thousand, four hundred thirty-three".