28228758112138 has 8 divisors (see below), whose sum is σ = 43375896611460. Its totient is φ = 13770125908320.

The previous prime is 28228758112133. The next prime is 28228758112141. The reversal of 28228758112138 is 83121185782282.

It can be written as a sum of positive squares in 2 ways, for example, as 25036843564489 + 3191914547649 = 5003683^2 + 1786593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28228758112133) 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, 172126573773 + ... + 172126573936.

Almost surely, 2^{28228758112138} is an apocalyptic number.

28228758112138 is a deficient number, since it is larger than the sum of its proper divisors (15147138499322).

28228758112138 is a wasteful number, since it uses less digits than its factorization.

28228758112138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344253147752.

The product of its digits is 6881280, while the sum is 58.

The spelling of 28228758112138 in words is "twenty-eight trillion, two hundred twenty-eight billion, seven hundred fifty-eight million, one hundred twelve thousand, one hundred thirty-eight".