28543104 has 80 divisors (see below), whose sum is σ = 84974670. Its totient is φ = 9510912.

The previous prime is 28543091. The next prime is 28543129. The reversal of 28543104 is 40134582.

It can be written as a sum of positive squares in only one way, i.e., 18045504 + 10497600 = 4248^2 + 3240^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8992 + ... + 11744.

Almost surely, 2^28543104 is an apocalyptic number.

28543104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28543104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42487335).

28543104 is an abundant number, since it is smaller than the sum of its proper divisors (56431566).

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

28543104 is an equidigital number, since it uses as much as digits as its factorization.

28543104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779 (or 2758 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 28543104 is about 5342.5746602177. The cubic root of 28543104 is about 305.6096522083.

Adding to 28543104 its reverse (40134582), we get a palindrome (68677686).

The spelling of 28543104 in words is "twenty-eight million, five hundred forty-three thousand, one hundred four".