28764608865 has 16 divisors (see below), whose sum is σ = 46777857216. Its totient is φ = 15089630400.

The previous prime is 28764608849. The next prime is 28764608869. The reversal of 28764608865 is 56880646782.

It is not a de Polignac number, because 28764608865 - 2⁴ = 28764608849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28764608799 and 28764608808.

It is not an unprimeable number, because it can be changed into a prime (28764608869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15717451 + ... + 15719280.

It is an arithmetic number, because the mean of its divisors is an integer number (2923616076).

Almost surely, 2^28764608865 is an apocalyptic number.

It is an amenable number.

28764608865 is a deficient number, since it is larger than the sum of its proper divisors (18013248351).

28764608865 is a wasteful number, since it uses less digits than its factorization.

28764608865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31436800.

The product of its (nonzero) digits is 30965760, while the sum is 60.

The spelling of 28764608865 in words is "twenty-eight billion, seven hundred sixty-four million, six hundred eight thousand, eight hundred sixty-five".