28776756 has 24 divisors (see below), whose sum is σ = 67525920. Its totient is φ = 9537952.

The previous prime is 28776743. The next prime is 28776757. The reversal of 28776756 is 65767782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28776757) by changing a digit.

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, 4551 + ... + 8846.

It is an arithmetic number, because the mean of its divisors is an integer number (2813580).

Almost surely, 2^28776756 is an apocalyptic number.

It is an amenable number.

28776756 is an abundant number, since it is smaller than the sum of its proper divisors (38749164).

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

28776756 is a wasteful number, since it uses less digits than its factorization.

28776756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13583 (or 13581 counting only the distinct ones).

The product of its digits is 987840, while the sum is 48.

The square root of 28776756 is about 5364.3970770255. The cubic root of 28776756 is about 306.4412873530.

The spelling of 28776756 in words is "twenty-eight million, seven hundred seventy-six thousand, seven hundred fifty-six".