28811814538 has 16 divisors (see below), whose sum is σ = 46589550336. Its totient is φ = 13284221040.

The previous prime is 28811814497. The next prime is 28811814553. The reversal of 28811814538 is 83541811882.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28811814491 and 28811814500.

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 7 ways as a sum of consecutive naturals, for example, 538098 + ... + 589213.

It is an arithmetic number, because the mean of its divisors is an integer number (2911846896).

Almost surely, 2^28811814538 is an apocalyptic number.

28811814538 is a deficient number, since it is larger than the sum of its proper divisors (17777735798).

28811814538 is a wasteful number, since it uses less digits than its factorization.

28811814538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128309.

The product of its digits is 491520, while the sum is 49.

The spelling of 28811814538 in words is "twenty-eight billion, eight hundred eleven million, eight hundred fourteen thousand, five hundred thirty-eight".