28875744 has 96 divisors (see below), whose sum is σ = 88704000. Its totient is φ = 9113472.

The previous prime is 28875733. The next prime is 28875751. The reversal of 28875744 is 44757882.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 28875744.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15537 + ... + 17295.

It is an arithmetic number, because the mean of its divisors is an integer number (924000).

Almost surely, 2^28875744 is an apocalyptic number.

28875744 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 28875744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44352000).

28875744 is an abundant number, since it is smaller than the sum of its proper divisors (59828256).

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

28875744 is a wasteful number, since it uses less digits than its factorization.

28875744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1783 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 28875744 is about 5373.6155426305. The cubic root of 28875744 is about 306.7922568982.

The spelling of 28875744 in words is "twenty-eight million, eight hundred seventy-five thousand, seven hundred forty-four".