28782056 has 16 divisors (see below), whose sum is σ = 54362340. Its totient is φ = 14285440.

The previous prime is 28782049. The next prime is 28782059. The reversal of 28782056 is 65028782.

It can be written as a sum of positive squares in 2 ways, for example, as 26112100 + 2669956 = 5110^2 + 1634^2 .

It is not an unprimeable number, because it can be changed into a prime (28782059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12035 + ... + 14226.

Almost surely, 2^28782056 is an apocalyptic number.

It is an amenable number.

28782056 is a deficient number, since it is larger than the sum of its proper divisors (25580284).

28782056 is a wasteful number, since it uses less digits than its factorization.

28782056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26404 (or 26400 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 28782056 is about 5364.8910520159. The cubic root of 28782056 is about 306.4600992850.

The spelling of 28782056 in words is "twenty-eight million, seven hundred eighty-two thousand, fifty-six".