28490 has 32 divisors (see below), whose sum is σ = 65664. Its totient is φ = 8640.

The previous prime is 28477. The next prime is 28493. The reversal of 28490 is 9482.

It is a nialpdrome in base 13 and base 14.

It is a zygodrome in base 6 and base 13.

It is not an unprimeable number, because it can be changed into a prime (28493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752 + ... + 788.

It is an arithmetic number, because the mean of its divisors is an integer number (2052).

2²⁸⁴⁹⁰ is an apocalyptic number.

28490 is an abundant number, since it is smaller than the sum of its proper divisors (37174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32832).

28490 is a wasteful number, since it uses less digits than its factorization.

28490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28490 is about 168.7898101190. The cubic root of 28490 is about 30.5420007218.

The spelling of 28490 in words is "twenty-eight thousand, four hundred ninety".