28776768 has 56 divisors (see below), whose sum is σ = 77309472. Its totient is φ = 9444864.

The previous prime is 28776757. The next prime is 28776779. The reversal of 28776768 is 86767782.

It is an interprime number because it is at equal distance from previous prime (28776757) and next prime (28776779).

It is a self number, because there is not a number n which added to its sum of digits gives 28776768.

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, 11746 + ... + 13982.

Almost surely, 2^28776768 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 28776768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38654736).

28776768 is an abundant number, since it is smaller than the sum of its proper divisors (48532704).

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

28776768 is a wasteful number, since it uses less digits than its factorization.

28776768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319 (or 2309 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 28776768 is about 5364.3981955108. The cubic root of 28776768 is about 306.4413299487.

The spelling of 28776768 in words is "twenty-eight million, seven hundred seventy-six thousand, seven hundred sixty-eight".