28112744 has 32 divisors (see below), whose sum is σ = 58091040. Its totient is φ = 12648000.

The previous prime is 28112743. The next prime is 28112759. The reversal of 28112744 is 44721182.

It is not an unprimeable number, because it can be changed into a prime (28112741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7307 + ... + 10469.

It is an arithmetic number, because the mean of its divisors is an integer number (1815345).

Almost surely, 2^28112744 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 28112744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29045520).

28112744 is an abundant number, since it is smaller than the sum of its proper divisors (29978296).

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

28112744 is a wasteful number, since it uses less digits than its factorization.

28112744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281 (or 3277 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 28112744 is about 5302.1452262268. The cubic root of 28112744 is about 304.0659194538.

It can be divided in two parts, 2811 and 2744, that added together give a palindrome (5555).

The spelling of 28112744 in words is "twenty-eight million, one hundred twelve thousand, seven hundred forty-four".