28500024 has 96 divisors (see below), whose sum is σ = 86647680. Its totient is φ = 7650816.

The previous prime is 28500023. The next prime is 28500029. The reversal of 28500024 is 42000582.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28500023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48259 + ... + 48845.

It is an arithmetic number, because the mean of its divisors is an integer number (902580).

Almost surely, 2^28500024 is an apocalyptic number.

28500024 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 28500024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43323840).

28500024 is an abundant number, since it is smaller than the sum of its proper divisors (58147656).

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

28500024 is a wasteful number, since it uses less digits than its factorization.

28500024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 28500024 is about 5338.5413738211. The cubic root of 28500024 is about 305.4558229564.

The spelling of 28500024 in words is "twenty-eight million, five hundred thousand, twenty-four".