28055885237 has 2 divisors, whose sum is σ = 28055885238. Its totient is φ = 28055885236.

The previous prime is 28055885219. The next prime is 28055885243. The reversal of 28055885237 is 73258855082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16986951556 + 11068933681 = 130334^2 + 105209^2 .

It is a cyclic number.

It is not a de Polignac number, because 28055885237 - 2¹² = 28055881141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28055885257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14027942618 + 14027942619.

It is an arithmetic number, because the mean of its divisors is an integer number (14027942619).

Almost surely, 2^28055885237 is an apocalyptic number.

It is an amenable number.

28055885237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28055885237 is an equidigital number, since it uses as much as digits as its factorization.

28055885237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 28055885237 in words is "twenty-eight billion, fifty-five million, eight hundred eighty-five thousand, two hundred thirty-seven".