28671117394 has 16 divisors (see below), whose sum is σ = 43215050520. Its totient is φ = 14266160640.

The previous prime is 28671117379. The next prime is 28671117407. The reversal of 28671117394 is 49371117682.

It can be written as a sum of positive squares in 4 ways, for example, as 28620180625 + 50936769 = 169175^2 + 7137^2 .

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 7 ways as a sum of consecutive naturals, for example, 1027264 + ... + 1054804.

Almost surely, 2^28671117394 is an apocalyptic number.

28671117394 is a deficient number, since it is larger than the sum of its proper divisors (14543933126).

28671117394 is a wasteful number, since it uses less digits than its factorization.

28671117394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30045.

The product of its digits is 508032, while the sum is 49.

The spelling of 28671117394 in words is "twenty-eight billion, six hundred seventy-one million, one hundred seventeen thousand, three hundred ninety-four".