28992802861 has 12 divisors (see below), whose sum is σ = 31872758400. Its totient is φ = 26353259240.

The previous prime is 28992802849. The next prime is 28992802877. The reversal of 28992802861 is 16820829982.

It is not a de Polignac number, because 28992802861 - 2¹¹ = 28992800813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28992802561) 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 11 ways as a sum of consecutive naturals, for example, 1126980 + ... + 1152418.

It is an arithmetic number, because the mean of its divisors is an integer number (2656063200).

Almost surely, 2^28992802861 is an apocalyptic number.

It is an amenable number.

28992802861 is a deficient number, since it is larger than the sum of its proper divisors (2879955539).

28992802861 is a wasteful number, since it uses less digits than its factorization.

28992802861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34880 (or 34869 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 28992802861 in words is "twenty-eight billion, nine hundred ninety-two million, eight hundred two thousand, eight hundred sixty-one".