28540567864 has 8 divisors (see below), whose sum is σ = 53513564760. Its totient is φ = 14270283928.

The previous prime is 28540567813. The next prime is 28540567873. The reversal of 28540567864 is 46876504582.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783785484 + ... + 1783785499.

It is an arithmetic number, because the mean of its divisors is an integer number (6689195595).

Almost surely, 2^28540567864 is an apocalyptic number.

It is an amenable number.

28540567864 is a deficient number, since it is larger than the sum of its proper divisors (24972996896).

28540567864 is a wasteful number, since it uses less digits than its factorization.

28540567864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567570989 (or 3567570985 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 28540567864 in words is "twenty-eight billion, five hundred forty million, five hundred sixty-seven thousand, eight hundred sixty-four".