28461 has 8 divisors (see below), whose sum is σ = 38880. Its totient is φ = 18512.

The previous prime is 28447. The next prime is 28463. The reversal of 28461 is 16482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28461 - 2⁵ = 28429 is a prime.

It is a Curzon number.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28461.

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, 70 + ... + 248.

It is an arithmetic number, because the mean of its divisors is an integer number (4860).

2²⁸⁴⁶¹ is an apocalyptic number.

It is an amenable number.

28461 is a deficient number, since it is larger than the sum of its proper divisors (10419).

28461 is a wasteful number, since it uses less digits than its factorization.

28461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its digits is 384, while the sum is 21.

The square root of 28461 is about 168.7038825872. The cubic root of 28461 is about 30.5316342925.

Adding to 28461 its sum of digits (21), we get a palindrome (28482).

The spelling of 28461 in words is "twenty-eight thousand, four hundred sixty-one".