28773568 has 56 divisors (see below), whose sum is σ = 60807600. Its totient is φ = 13483008.

The previous prime is 28773553. The next prime is 28773601. The reversal of 28773568 is 86537782.

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, 68463 + ... + 68881.

It is an arithmetic number, because the mean of its divisors is an integer number (1085850).

Almost surely, 2^28773568 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 28773568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30403800).

28773568 is an abundant number, since it is smaller than the sum of its proper divisors (32034032).

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

28773568 is a wasteful number, since it uses less digits than its factorization.

28773568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 487 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 28773568 is about 5364.0999244981. The cubic root of 28773568 is about 306.4299706860.

The spelling of 28773568 in words is "twenty-eight million, seven hundred seventy-three thousand, five hundred sixty-eight".