28286694434 has 16 divisors (see below), whose sum is σ = 46375151616. Its totient is φ = 12881985600.

The previous prime is 28286694413. The next prime is 28286694439. The reversal of 28286694434 is 43449668282.

It is a self number, because there is not a number n which added to its sum of digits gives 28286694434.

It is not an unprimeable number, because it can be changed into a prime (28286694439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13417682 + ... + 13419789.

It is an arithmetic number, because the mean of its divisors is an integer number (2898446976).

Almost surely, 2^28286694434 is an apocalyptic number.

28286694434 is a deficient number, since it is larger than the sum of its proper divisors (18088457182).

28286694434 is a wasteful number, since it uses less digits than its factorization.

28286694434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26837521.

The product of its digits is 15925248, while the sum is 56.

The spelling of 28286694434 in words is "twenty-eight billion, two hundred eighty-six million, six hundred ninety-four thousand, four hundred thirty-four".