28393264 has 40 divisors (see below), whose sum is σ = 59514048. Its totient is φ = 13071360.

The previous prime is 28393259. The next prime is 28393271. The reversal of 28393264 is 46239382.

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 7 ways as a sum of consecutive naturals, for example, 11674 + ... + 13894.

Almost surely, 2^28393264 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 28393264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29757024).

28393264 is an abundant number, since it is smaller than the sum of its proper divisors (31120784).

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

28393264 is a wasteful number, since it uses less digits than its factorization.

28393264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293 (or 2287 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 28393264 is about 5328.5330063724. The cubic root of 28393264 is about 305.0739371050.

The spelling of 28393264 in words is "twenty-eight million, three hundred ninety-three thousand, two hundred sixty-four".