28875169 has 2 divisors, whose sum is σ = 28875170. Its totient is φ = 28875168.

The previous prime is 28875113. The next prime is 28875227. The reversal of 28875169 is 96157882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 9690769 = 4380^2 + 3113^2 .

It is a cyclic number.

It is not a de Polignac number, because 28875169 - 2¹⁷ = 28744097 is a prime.

It is a super-2 number, since 2×28875169² = 1667550769557122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28075169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437584 + 14437585.

It is an arithmetic number, because the mean of its divisors is an integer number (14437585).

Almost surely, 2^28875169 is an apocalyptic number.

It is an amenable number.

28875169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28875169 is an equidigital number, since it uses as much as digits as its factorization.

28875169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 28875169 is about 5373.5620402113. The cubic root of 28875169 is about 306.7902205094.

It can be divided in two parts, 288 and 75169, that added together give a palindrome (75457).

The spelling of 28875169 in words is "twenty-eight million, eight hundred seventy-five thousand, one hundred sixty-nine".