28107685078 has 48 divisors (see below), whose sum is σ = 47726784000. Its totient is φ = 12400193520.

The previous prime is 28107685007. The next prime is 28107685079. The reversal of 28107685078 is 87058670182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28107685079) 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 23 ways as a sum of consecutive naturals, for example, 1115503 + ... + 1140421.

It is an arithmetic number, because the mean of its divisors is an integer number (994308000).

Almost surely, 2^28107685078 is an apocalyptic number.

28107685078 is a deficient number, since it is larger than the sum of its proper divisors (19619098922).

28107685078 is a wasteful number, since it uses less digits than its factorization.

28107685078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25081 (or 25070 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 28107685078 in words is "twenty-eight billion, one hundred seven million, six hundred eighty-five thousand, seventy-eight".