28234758564 has 18 divisors (see below), whose sum is σ = 71371195350. Its totient is φ = 9411586176.

The previous prime is 28234758523. The next prime is 28234758593. The reversal of 28234758564 is 46585743282.

28234758564 is a `hidden beast` number, since 2 + 8 + 2 + 3 + 4 + 75 + 8 + 564 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24683552100 + 3551206464 = 157110^2 + 59592^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 28234758564.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 392149389 + ... + 392149460.

Almost surely, 2^28234758564 is an apocalyptic number.

It is an amenable number.

28234758564 is an abundant number, since it is smaller than the sum of its proper divisors (43136436786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28234758564 is a wasteful number, since it uses less digits than its factorization.

28234758564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784298859 (or 784298854 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 54.

The spelling of 28234758564 in words is "twenty-eight billion, two hundred thirty-four million, seven hundred fifty-eight thousand, five hundred sixty-four".