28620554785 has 16 divisors (see below), whose sum is σ = 34518242304. Its totient is φ = 22780844352.

The previous prime is 28620554777. The next prime is 28620554801. The reversal of 28620554785 is 58745502682.

It is a cyclic number.

It is not a de Polignac number, because 28620554785 - 2³ = 28620554777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2282844 + ... + 2295346.

It is an arithmetic number, because the mean of its divisors is an integer number (2157390144).

Almost surely, 2^28620554785 is an apocalyptic number.

It is an amenable number.

28620554785 is a deficient number, since it is larger than the sum of its proper divisors (5897687519).

28620554785 is a wasteful number, since it uses less digits than its factorization.

28620554785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14784.

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 28620554785 in words is "twenty-eight billion, six hundred twenty million, five hundred fifty-four thousand, seven hundred eighty-five".