28768512 has 72 divisors (see below), whose sum is σ = 78293376. Its totient is φ = 9373696.

The previous prime is 28768507. The next prime is 28768513. The reversal of 28768512 is 21586782.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28768513) 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, 35698 + ... + 36494.

It is an arithmetic number, because the mean of its divisors is an integer number (1087408).

Almost surely, 2^28768512 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 28768512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39146688).

28768512 is an abundant number, since it is smaller than the sum of its proper divisors (49524864).

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

28768512 is an equidigital number, since it uses as much as digits as its factorization.

28768512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 849 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 28768512 is about 5363.6286224906. The cubic root of 28768512 is about 306.4120213341.

The spelling of 28768512 in words is "twenty-eight million, seven hundred sixty-eight thousand, five hundred twelve".