28081801124 has 12 divisors (see below), whose sum is σ = 52923394524. Its totient is φ = 12960831264.

The previous prime is 28081801103. The next prime is 28081801193. The reversal of 28081801124 is 42110818082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9610273024 + 18471528100 = 98032^2 + 135910^2 .

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 3 ways as a sum of consecutive naturals, for example, 270017267 + ... + 270017370.

It is an arithmetic number, because the mean of its divisors is an integer number (4410282877).

Almost surely, 2^28081801124 is an apocalyptic number.

It is an amenable number.

28081801124 is a deficient number, since it is larger than the sum of its proper divisors (24841593400).

28081801124 is a wasteful number, since it uses less digits than its factorization.

28081801124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540034654 (or 540034652 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 35.

The spelling of 28081801124 in words is "twenty-eight billion, eighty-one million, eight hundred one thousand, one hundred twenty-four".