27728630441 has 2 divisors, whose sum is σ = 27728630442. Its totient is φ = 27728630440.

The previous prime is 27728630437. The next prime is 27728630483. The reversal of 27728630441 is 14403682772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19588801600 + 8139828841 = 139960^2 + 90221^2 .

It is a cyclic number.

It is not a de Polignac number, because 27728630441 - 2² = 27728630437 is a prime.

It is a super-2 number, since 2×27728630441² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27728630392 and 27728630401.

It is not a weakly prime, because it can be changed into another prime (27728630491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864315220 + 13864315221.

It is an arithmetic number, because the mean of its divisors is an integer number (13864315221).

Almost surely, 2^27728630441 is an apocalyptic number.

It is an amenable number.

27728630441 is a deficient number, since it is larger than the sum of its proper divisors (1).

27728630441 is an equidigital number, since it uses as much as digits as its factorization.

27728630441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 27728630441 in words is "twenty-seven billion, seven hundred twenty-eight million, six hundred thirty thousand, four hundred forty-one".