28805441437 has 2 divisors, whose sum is σ = 28805441438. Its totient is φ = 28805441436.

The previous prime is 28805441429. The next prime is 28805441479. The reversal of 28805441437 is 73414450882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20795370436 + 8010071001 = 144206^2 + 89499^2 .

It is a cyclic number.

It is not a de Polignac number, because 28805441437 - 2³ = 28805441429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28805441537) 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, 14402720718 + 14402720719.

It is an arithmetic number, because the mean of its divisors is an integer number (14402720719).

Almost surely, 2^28805441437 is an apocalyptic number.

It is an amenable number.

28805441437 is a deficient number, since it is larger than the sum of its proper divisors (1).

28805441437 is an equidigital number, since it uses as much as digits as its factorization.

28805441437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 28805441437 in words is "twenty-eight billion, eight hundred five million, four hundred forty-one thousand, four hundred thirty-seven".