28758056056784 has 20 divisors (see below), whose sum is σ = 55725391622340. Its totient is φ = 14377309831680.

The previous prime is 28758056056783. The next prime is 28758056056801. The reversal of 28758056056784 is 48765065085782.

It can be written as a sum of positive squares in 2 ways, for example, as 16936286698384 + 11821769358400 = 4115372^2 + 3438280^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758056056783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107249207 + ... + 107517014.

It is an arithmetic number, because the mean of its divisors is an integer number (2786269581117).

Almost surely, 2^{28758056056784} is an apocalyptic number.

It is an amenable number.

28758056056784 is a deficient number, since it is larger than the sum of its proper divisors (26967335565556).

28758056056784 is a wasteful number, since it uses less digits than its factorization.

28758056056784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214774598 (or 214774592 counting only the distinct ones).

The product of its (nonzero) digits is 903168000, while the sum is 71.

The spelling of 28758056056784 in words is "twenty-eight trillion, seven hundred fifty-eight billion, fifty-six million, fifty-six thousand, seven hundred eighty-four".