28054728 has 128 divisors (see below), whose sum is σ = 85612800. Its totient is φ = 8460288.

The previous prime is 28054699. The next prime is 28054729. The reversal of 28054728 is 82745082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28054692 and 28054701.

It is not an unprimeable number, because it can be changed into a prime (28054729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272325 + ... + 272427.

It is an arithmetic number, because the mean of its divisors is an integer number (668850).

Almost surely, 2^28054728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28054728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42806400).

28054728 is an abundant number, since it is smaller than the sum of its proper divisors (57558072).

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

28054728 is a wasteful number, since it uses less digits than its factorization.

28054728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28054728 is about 5296.6714075918. The cubic root of 28054728 is about 303.8566094307.

It can be divided in two parts, 28054 and 728, that added together give a palindrome (28782).

The spelling of 28054728 in words is "twenty-eight million, fifty-four thousand, seven hundred twenty-eight".