28366744 has 64 divisors (see below), whose sum is σ = 65318400. Its totient is φ = 11272704.

The previous prime is 28366721. The next prime is 28366763. The reversal of 28366744 is 44766382.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28366697 and 28366706.

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, 78837 + ... + 79195.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^28366744 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 28366744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32659200).

28366744 is an abundant number, since it is smaller than the sum of its proper divisors (36951656).

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

28366744 is a wasteful number, since it uses less digits than its factorization.

28366744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 468 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 28366744 is about 5326.0439352300. The cubic root of 28366744 is about 304.9789253556.

The spelling of 28366744 in words is "twenty-eight million, three hundred sixty-six thousand, seven hundred forty-four".