28830287081 has 2 divisors, whose sum is σ = 28830287082. Its totient is φ = 28830287080.

The previous prime is 28830287069. The next prime is 28830287111. The reversal of 28830287081 is 18078203882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18956883856 + 9873403225 = 137684^2 + 99365^2 .

It is a cyclic number.

It is not a de Polignac number, because 28830287081 - 2²⁶ = 28763178217 is a prime.

It is a super-2 number, since 2×28830287081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28830287021) 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 as a sum of consecutive naturals, namely, 14415143540 + 14415143541.

It is an arithmetic number, because the mean of its divisors is an integer number (14415143541).

Almost surely, 2^28830287081 is an apocalyptic number.

It is an amenable number.

28830287081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28830287081 is an equidigital number, since it uses as much as digits as its factorization.

28830287081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 28830287081 in words is "twenty-eight billion, eight hundred thirty million, two hundred eighty-seven thousand, eighty-one".