28927744 has 72 divisors (see below), whose sum is σ = 64018080. Its totient is φ = 13021184.

The previous prime is 28927733. The next prime is 28927751. The reversal of 28927744 is 44772982.

Its product of digits (225792) is a multiple of the sum of its prime divisors (42).

It is a self number, because there is not a number n which added to its sum of digits gives 28927744.

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, 1257717 + ... + 1257739.

It is an arithmetic number, because the mean of its divisors is an integer number (889140).

Almost surely, 2^28927744 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 28927744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32009040).

28927744 is an abundant number, since it is smaller than the sum of its proper divisors (35090336).

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

28927744 is an frugal number, since it uses more digits than its factorization.

28927744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 42 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 28927744 is about 5378.4518218536. The cubic root of 28927744 is about 306.9763056122.

The spelling of 28927744 in words is "twenty-eight million, nine hundred twenty-seven thousand, seven hundred forty-four".