28438837241 has 2 divisors, whose sum is σ = 28438837242. Its totient is φ = 28438837240.

The previous prime is 28438837123. The next prime is 28438837261. The reversal of 28438837241 is 14273883482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28435739641 + 3097600 = 168629^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28438837241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28438837241.

It is not a weakly prime, because it can be changed into another prime (28438837261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14219418620 + 14219418621.

It is an arithmetic number, because the mean of its divisors is an integer number (14219418621).

Almost surely, 2^28438837241 is an apocalyptic number.

It is an amenable number.

28438837241 is a deficient number, since it is larger than the sum of its proper divisors (1).

28438837241 is an equidigital number, since it uses as much as digits as its factorization.

28438837241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2064384, while the sum is 50.

The spelling of 28438837241 in words is "twenty-eight billion, four hundred thirty-eight million, eight hundred thirty-seven thousand, two hundred forty-one".