28128704294 has 16 divisors (see below), whose sum is σ = 42518453040. Its totient is φ = 13956157440.

The previous prime is 28128704291. The next prime is 28128704353. The reversal of 28128704294 is 49240782182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128704291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141662 + ... + 276270.

It is an arithmetic number, because the mean of its divisors is an integer number (2657403315).

Almost surely, 2^28128704294 is an apocalyptic number.

28128704294 is a deficient number, since it is larger than the sum of its proper divisors (14389748746).

28128704294 is a wasteful number, since it uses less digits than its factorization.

28128704294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135415.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 28128704294 in words is "twenty-eight billion, one hundred twenty-eight million, seven hundred four thousand, two hundred ninety-four".