28540567865 has 16 divisors (see below), whose sum is σ = 35820734976. Its totient is φ = 21789028800.

The previous prime is 28540567813. The next prime is 28540567873. The reversal of 28540567865 is 56876504582.

It is not a de Polignac number, because 28540567865 - 2¹⁶ = 28540502329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28540567865.

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, 238346 + ... + 337475.

It is an arithmetic number, because the mean of its divisors is an integer number (2238795936).

Almost surely, 2^28540567865 is an apocalyptic number.

It is an amenable number.

28540567865 is a deficient number, since it is larger than the sum of its proper divisors (7280167111).

28540567865 is a wasteful number, since it uses less digits than its factorization.

28540567865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576280.

The product of its (nonzero) digits is 16128000, while the sum is 56.

The spelling of 28540567865 in words is "twenty-eight billion, five hundred forty million, five hundred sixty-seven thousand, eight hundred sixty-five".