28285123658 has 16 divisors (see below), whose sum is σ = 46568709216. Its totient is φ = 12777996240.

The previous prime is 28285123649. The next prime is 28285123673. The reversal of 28285123658 is 85632158282.

It is a Curzon number.

It is an unprimeable number.

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, 3940241 + ... + 3947412.

It is an arithmetic number, because the mean of its divisors is an integer number (2910544326).

Almost surely, 2^28285123658 is an apocalyptic number.

28285123658 is a deficient number, since it is larger than the sum of its proper divisors (18283585558).

28285123658 is a wasteful number, since it uses less digits than its factorization.

28285123658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887829.

The product of its digits is 1843200, while the sum is 50.

The spelling of 28285123658 in words is "twenty-eight billion, two hundred eighty-five million, one hundred twenty-three thousand, six hundred fifty-eight".