28469 has 8 divisors (see below), whose sum is σ = 33600. Its totient is φ = 24108.

The previous prime is 28463. The next prime is 28477. The reversal of 28469 is 96482.

It is not a de Polignac number, because 28469 - 2¹² = 24373 is a prime.

It is a super-2 number, since 2×28469² = 1620967922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302 + ... + 384.

It is an arithmetic number, because the mean of its divisors is an integer number (4200).

2²⁸⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

28469 is a deficient number, since it is larger than the sum of its proper divisors (5131).

28469 is an frugal number, since it uses more digits than its factorization.

28469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 90 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 28469 is about 168.7275911047. The cubic root of 28469 is about 30.5344947002.

It can be divided in two parts, 284 and 69, that added together give a palindrome (353).

The spelling of 28469 in words is "twenty-eight thousand, four hundred sixty-nine".