28727824 has 40 divisors (see below), whose sum is σ = 60853248. Its totient is φ = 13079040.

The previous prime is 28727819. The next prime is 28727837. The reversal of 28727824 is 42872782.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6729 + ... + 10135.

Almost surely, 2^28727824 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 28727824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30426624).

28727824 is an abundant number, since it is smaller than the sum of its proper divisors (32125424).

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

28727824 is a wasteful number, since it uses less digits than its factorization.

28727824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463 (or 3457 counting only the distinct ones).

The product of its digits is 100352, while the sum is 40.

The square root of 28727824 is about 5359.8343257978. The cubic root of 28727824 is about 306.2674978757.

The spelling of 28727824 in words is "twenty-eight million, seven hundred twenty-seven thousand, eight hundred twenty-four".