28560500 has 36 divisors (see below), whose sum is σ = 62638212. Its totient is φ = 11376400.

The previous prime is 28560491. The next prime is 28560541. The reversal of 28560500 is 506582.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 913936 + 27646564 = 956^2 + 5258^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28560500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119381 + ... + 119619.

Almost surely, 2^28560500 is an apocalyptic number.

28560500 is a gapful number since it is divisible by the number (20) 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 28560500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31319106).

28560500 is an abundant number, since it is smaller than the sum of its proper divisors (34077712).

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

28560500 is an equidigital number, since it uses as much as digits as its factorization.

28560500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 28560500 is about 5344.2024662245. The cubic root of 28560500 is about 305.6717256468.

The spelling of 28560500 in words is "twenty-eight million, five hundred sixty thousand, five hundred".