28556222783 has 4 divisors (see below), whose sum is σ = 31152243048. Its totient is φ = 25960202520.

The previous prime is 28556222771. The next prime is 28556222801. The reversal of 28556222783 is 38722265582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28556222783 - 2²⁴ = 28539445567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28556222713) 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, 1298010116 + ... + 1298010137.

It is an arithmetic number, because the mean of its divisors is an integer number (7788060762).

Almost surely, 2^28556222783 is an apocalyptic number.

28556222783 is a deficient number, since it is larger than the sum of its proper divisors (2596020265).

28556222783 is a wasteful number, since it uses less digits than its factorization.

28556222783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596020264.

The product of its digits is 3225600, while the sum is 50.

The spelling of 28556222783 in words is "twenty-eight billion, five hundred fifty-six million, two hundred twenty-two thousand, seven hundred eighty-three".