28555782 has 16 divisors (see below), whose sum is σ = 57318192. Its totient is φ = 9484160.

The previous prime is 28555777. The next prime is 28555783. The reversal of 28555782 is 28755582.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555783) 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, 6783 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (3582387).

Almost surely, 2^28555782 is an apocalyptic number.

28555782 is an abundant number, since it is smaller than the sum of its proper divisors (28762410).

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

28555782 is a wasteful number, since it uses less digits than its factorization.

28555782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17223.

The product of its digits is 224000, while the sum is 42.

The square root of 28555782 is about 5343.7610350763. The cubic root of 28555782 is about 305.6548930911.

The spelling of 28555782 in words is "twenty-eight million, five hundred fifty-five thousand, seven hundred eighty-two".