28056107785 has 32 divisors (see below), whose sum is σ = 35321932800. Its totient is φ = 21367756800.

The previous prime is 28056107753. The next prime is 28056107791. The reversal of 28056107785 is 58770165082.

It is not a de Polignac number, because 28056107785 - 2⁵ = 28056107753 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3095941 + ... + 3104989.

It is an arithmetic number, because the mean of its divisors is an integer number (1103810400).

Almost surely, 2^28056107785 is an apocalyptic number.

It is an amenable number.

28056107785 is a deficient number, since it is larger than the sum of its proper divisors (7265825015).

28056107785 is a wasteful number, since it uses less digits than its factorization.

28056107785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9409.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 28056107785 in words is "twenty-eight billion, fifty-six million, one hundred seven thousand, seven hundred eighty-five".