28559872 has 60 divisors (see below), whose sum is σ = 62859258. Its totient is φ = 12953600.

The previous prime is 28559857. The next prime is 28559899. The reversal of 28559872 is 27895582.

It can be written as a sum of positive squares in only one way, i.e., 26050816 + 2509056 = 5104^2 + 1584^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61722 + ... + 62182.

Almost surely, 2^28559872 is an apocalyptic number.

28559872 is a gapful number since it is divisible by the number (22) 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 28559872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31429629).

28559872 is an abundant number, since it is smaller than the sum of its proper divisors (34299386).

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

28559872 is an equidigital number, since it uses as much as digits as its factorization.

28559872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 474 counting only the distinct ones).

The product of its digits is 403200, while the sum is 46.

The square root of 28559872 is about 5344.1437106425. The cubic root of 28559872 is about 305.6694852185.

The spelling of 28559872 in words is "twenty-eight million, five hundred fifty-nine thousand, eight hundred seventy-two".