28023181123 has 16 divisors (see below), whose sum is σ = 34227339264. Its totient is φ = 22395646080.

The previous prime is 28023181097. The next prime is 28023181127. The reversal of 28023181123 is 32118132082.

It is a cyclic number.

It is not a de Polignac number, because 28023181123 - 2⁵ = 28023181091 is a prime.

It is a super-2 number, since 2×28023181123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28023181127) 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 15 ways as a sum of consecutive naturals, for example, 1087683 + ... + 1113148.

It is an arithmetic number, because the mean of its divisors is an integer number (2139208704).

Almost surely, 2^28023181123 is an apocalyptic number.

28023181123 is a deficient number, since it is larger than the sum of its proper divisors (6204158141).

28023181123 is a wasteful number, since it uses less digits than its factorization.

28023181123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200962.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 28023181123 in words is "twenty-eight billion, twenty-three million, one hundred eighty-one thousand, one hundred twenty-three".