28985269 has 2 divisors, whose sum is σ = 28985270. Its totient is φ = 28985268.

The previous prime is 28985263. The next prime is 28985273. The reversal of 28985269 is 96258982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14922769 + 14062500 = 3863^2 + 3750^2 .

It is a cyclic number.

It is not a de Polignac number, because 28985269 - 2³ = 28985261 is a prime.

It is a super-2 number, since 2×28985269² = 1680291638004722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28985261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14492634 + 14492635.

It is an arithmetic number, because the mean of its divisors is an integer number (14492635).

Almost surely, 2^28985269 is an apocalyptic number.

It is an amenable number.

28985269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28985269 is an equidigital number, since it uses as much as digits as its factorization.

28985269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 49.

The square root of 28985269 is about 5383.7968943860. The cubic root of 28985269 is about 307.1796527243.

It can be divided in two parts, 289 and 85269, that added together give a palindrome (85558).

The spelling of 28985269 in words is "twenty-eight million, nine hundred eighty-five thousand, two hundred sixty-nine".