28824520 has 128 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 9732096.

The previous prime is 28824487. The next prime is 28824529. The reversal of 28824520 is 2542882.

It is not an unprimeable number, because it can be changed into a prime (28824529) 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, 297112 + ... + 297208.

It is an arithmetic number, because the mean of its divisors is an integer number (595350).

Almost surely, 2^28824520 is an apocalyptic number.

28824520 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 28824520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38102400).

28824520 is an abundant number, since it is smaller than the sum of its proper divisors (47380280).

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

28824520 is a wasteful number, since it uses less digits than its factorization.

28824520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 28824520 is about 5368.8471760705. The cubic root of 28824520 is about 306.6107385931.

The spelling of 28824520 in words is "twenty-eight million, eight hundred twenty-four thousand, five hundred twenty".