28005505427 has 2 divisors, whose sum is σ = 28005505428. Its totient is φ = 28005505426.

The previous prime is 28005505351. The next prime is 28005505459. The reversal of 28005505427 is 72450550082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28005505427 - 2¹² = 28005501331 is a prime.

It is not a weakly prime, because it can be changed into another prime (28005505477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14002752713 + 14002752714.

It is an arithmetic number, because the mean of its divisors is an integer number (14002752714).

Almost surely, 2^28005505427 is an apocalyptic number.

28005505427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28005505427 is an equidigital number, since it uses as much as digits as its factorization.

28005505427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112000, while the sum is 38.

The spelling of 28005505427 in words is "twenty-eight billion, five million, five hundred five thousand, four hundred twenty-seven".