28465 has 4 divisors (see below), whose sum is σ = 34164. Its totient is φ = 22768.

The previous prime is 28463. The next prime is 28477. The reversal of 28465 is 56482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6561 + 21904 = 81^2 + 148^2 .

It is a cyclic number.

It is not a de Polignac number, because 28465 - 2¹ = 28463 is a prime.

It is a super-3 number, since 3×28465³ = 69191830333875, which contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

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 3 ways as a sum of consecutive naturals, for example, 2842 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (8541).

2²⁸⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

28465 is a deficient number, since it is larger than the sum of its proper divisors (5699).

28465 is an equidigital number, since it uses as much as digits as its factorization.

28465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5698.

The product of its digits is 1920, while the sum is 25.

The square root of 28465 is about 168.7157372624. The cubic root of 28465 is about 30.5330645633.

The spelling of 28465 in words is "twenty-eight thousand, four hundred sixty-five".