28091048831 has 2 divisors, whose sum is σ = 28091048832. Its totient is φ = 28091048830.

The previous prime is 28091048819. The next prime is 28091048927. The reversal of 28091048831 is 13884019082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28091048831 is a prime.

It is a super-2 number, since 2×28091048831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28091048131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14045524415 + 14045524416.

It is an arithmetic number, because the mean of its divisors is an integer number (14045524416).

Almost surely, 2^28091048831 is an apocalyptic number.

28091048831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28091048831 is an equidigital number, since it uses as much as digits as its factorization.

28091048831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 28091048831 in words is "twenty-eight billion, ninety-one million, forty-eight thousand, eight hundred thirty-one".