28861799850 has 96 divisors (see below), whose sum is σ = 85648059840. Its totient is φ = 7104438720.

The previous prime is 28861799789. The next prime is 28861799867. The reversal of 28861799850 is 5899716882.

It is a happy number.

28861799850 is a `hidden beast` number, since 2 + 8 + 8 + 617 + 9 + 9 + 8 + 5 + 0 = 666.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 804724 + ... + 839823.

It is an arithmetic number, because the mean of its divisors is an integer number (892167290).

Almost surely, 2^28861799850 is an apocalyptic number.

28861799850 is an abundant number, since it is smaller than the sum of its proper divisors (56786259990).

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

28861799850 is a wasteful number, since it uses less digits than its factorization.

28861799850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644581 (or 1644570 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 28861799850 in words is "twenty-eight billion, eight hundred sixty-one million, seven hundred ninety-nine thousand, eight hundred fifty".