28818269 has 6 divisors (see below), whose sum is σ = 30415230. Its totient is φ = 27301176.

The previous prime is 28818253. The next prime is 28818323. The reversal of 28818269 is 96281882.

It can be written as a sum of positive squares in only one way, i.e., 25351225 + 3467044 = 5035^2 + 1862^2 .

It is not a de Polignac number, because 28818269 - 2⁴ = 28818253 is a prime.

It is a super-2 number, since 2×28818269² = 1660985256312722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28811269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39554 + ... + 40275.

It is an arithmetic number, because the mean of its divisors is an integer number (5069205).

Almost surely, 2^28818269 is an apocalyptic number.

It is an amenable number.

28818269 is a deficient number, since it is larger than the sum of its proper divisors (1596961).

28818269 is an equidigital number, since it uses as much as digits as its factorization.

28818269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79867 (or 79848 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 28818269 is about 5368.2649897336. The cubic root of 28818269 is about 306.5885727161.

The spelling of 28818269 in words is "twenty-eight million, eight hundred eighteen thousand, two hundred sixty-nine".