28075622429 has 2 divisors, whose sum is σ = 28075622430. Its totient is φ = 28075622428.

The previous prime is 28075622401. The next prime is 28075622431. The reversal of 28075622429 is 92422657082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25945799929 + 2129822500 = 161077^2 + 46150^2 .

It is a cyclic number.

It is not a de Polignac number, because 28075622429 - 2²⁰ = 28074573853 is a prime.

It is a Sophie Germain prime.

Together with 28075622431, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28075622929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14037811214 + 14037811215.

It is an arithmetic number, because the mean of its divisors is an integer number (14037811215).

Almost surely, 2^28075622429 is an apocalyptic number.

It is an amenable number.

28075622429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28075622429 is an equidigital number, since it uses as much as digits as its factorization.

28075622429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 28075622429 in words is "twenty-eight billion, seventy-five million, six hundred twenty-two thousand, four hundred twenty-nine".