28128688294 has 16 divisors (see below), whose sum is σ = 48223072800. Its totient is φ = 12054536064.

The previous prime is 28128688267. The next prime is 28128688319. The reversal of 28128688294 is 49288682182.

It is a congruent number.

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, 330142 + ... + 406510.

It is an arithmetic number, because the mean of its divisors is an integer number (3013942050).

Almost surely, 2^28128688294 is an apocalyptic number.

28128688294 is a deficient number, since it is larger than the sum of its proper divisors (20094384506).

28128688294 is a wasteful number, since it uses less digits than its factorization.

28128688294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102687.

The product of its digits is 7077888, while the sum is 58.

The spelling of 28128688294 in words is "twenty-eight billion, one hundred twenty-eight million, six hundred eighty-eight thousand, two hundred ninety-four".