28401773837 has 2 divisors, whose sum is σ = 28401773838. Its totient is φ = 28401773836.

The previous prime is 28401773801. The next prime is 28401773839. The reversal of 28401773837 is 73837710482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20753571721 + 7648202116 = 144061^2 + 87454^2 .

It is a cyclic number.

It is not a de Polignac number, because 28401773837 - 2⁸ = 28401773581 is a prime.

Together with 28401773839, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28401773839) by changing a digit.

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 as a sum of consecutive naturals, namely, 14200886918 + 14200886919.

It is an arithmetic number, because the mean of its divisors is an integer number (14200886919).

Almost surely, 2^28401773837 is an apocalyptic number.

It is an amenable number.

28401773837 is a deficient number, since it is larger than the sum of its proper divisors (1).

28401773837 is an equidigital number, since it uses as much as digits as its factorization.

28401773837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 28401773837 in words is "twenty-eight billion, four hundred one million, seven hundred seventy-three thousand, eight hundred thirty-seven".