28045850994 has 60 divisors (see below), whose sum is σ = 73103661774. Its totient is φ = 8013098016.

The previous prime is 28045850983. The next prime is 28045851047. The reversal of 28045850994 is 49905854082.

It is a happy number.

28045850994 is a `hidden beast` number, since 2 + 8 + 0 + 45 + 8 + 509 + 94 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22842392769 + 5203458225 = 151137^2 + 72135^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 28045850994.

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 29 ways as a sum of consecutive naturals, for example, 1758619 + ... + 1774494.

Almost surely, 2^28045850994 is an apocalyptic number.

28045850994 is an abundant number, since it is smaller than the sum of its proper divisors (45057810780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28045850994 is a wasteful number, since it uses less digits than its factorization.

28045850994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533141 (or 3533125 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 28045850994 in words is "twenty-eight billion, forty-five million, eight hundred fifty thousand, nine hundred ninety-four".