28101394427 has 2 divisors, whose sum is σ = 28101394428. Its totient is φ = 28101394426.

The previous prime is 28101394397. The next prime is 28101394499. The reversal of 28101394427 is 72449310182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28101394427 - 2⁸ = 28101394171 is a prime.

It is not a weakly prime, because it can be changed into another prime (28101391427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14050697213 + 14050697214.

It is an arithmetic number, because the mean of its divisors is an integer number (14050697214).

Almost surely, 2^28101394427 is an apocalyptic number.

28101394427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28101394427 is an equidigital number, since it uses as much as digits as its factorization.

28101394427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 28101394427 in words is "twenty-eight billion, one hundred one million, three hundred ninety-four thousand, four hundred twenty-seven".