28112515588 has 6 divisors (see below), whose sum is σ = 49196902286. Its totient is φ = 14056257792.

The previous prime is 28112515567. The next prime is 28112515589. The reversal of 28112515588 is 88551521182.

It can be written as a sum of positive squares in only one way, i.e., 27399518784 + 712996804 = 165528^2 + 26702^2 .

It is not an unprimeable number, because it can be changed into a prime (28112515589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3514064445 + ... + 3514064452.

Almost surely, 2^28112515588 is an apocalyptic number.

It is an amenable number.

28112515588 is a deficient number, since it is larger than the sum of its proper divisors (21084386698).

28112515588 is a wasteful number, since it uses less digits than its factorization.

28112515588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028128901 (or 7028128899 counting only the distinct ones).

The product of its digits is 256000, while the sum is 46.

The spelling of 28112515588 in words is "twenty-eight billion, one hundred twelve million, five hundred fifteen thousand, five hundred eighty-eight".