28451 has 4 divisors (see below), whose sum is σ = 29712. Its totient is φ = 27192.

The previous prime is 28447. The next prime is 28463. The reversal of 28451 is 15482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15482 = 2 ⋅7741.

It is a cyclic number.

It is not a de Polignac number, because 28451 - 2² = 28447 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (28411) 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, 596 + ... + 641.

It is an arithmetic number, because the mean of its divisors is an integer number (7428).

2²⁸⁴⁵¹ is an apocalyptic number.

28451 is a deficient number, since it is larger than the sum of its proper divisors (1261).

28451 is a wasteful number, since it uses less digits than its factorization.

28451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260.

The product of its digits is 320, while the sum is 20.

The square root of 28451 is about 168.6742422541. The cubic root of 28451 is about 30.5280580289.

The spelling of 28451 in words is "twenty-eight thousand, four hundred fifty-one".