28112288647 has 16 divisors (see below), whose sum is σ = 29004751872. Its totient is φ = 27233416800.

The previous prime is 28112288639. The next prime is 28112288669. The reversal of 28112288647 is 74688221182.

It is not a de Polignac number, because 28112288647 - 2³ = 28112288639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28112288647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28112288947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2001453 + ... + 2015449.

It is an arithmetic number, because the mean of its divisors is an integer number (1812796992).

Almost surely, 2^28112288647 is an apocalyptic number.

28112288647 is a deficient number, since it is larger than the sum of its proper divisors (892463225).

28112288647 is a wasteful number, since it uses less digits than its factorization.

28112288647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14478.

The product of its digits is 688128, while the sum is 49.

The spelling of 28112288647 in words is "twenty-eight billion, one hundred twelve million, two hundred eighty-eight thousand, six hundred forty-seven".