28204606447 has 2 divisors, whose sum is σ = 28204606448. Its totient is φ = 28204606446.

The previous prime is 28204606439. The next prime is 28204606481. The reversal of 28204606447 is 74460640282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28204606447 - 2³ = 28204606439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28204606247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14102303223 + 14102303224.

It is an arithmetic number, because the mean of its divisors is an integer number (14102303224).

Almost surely, 2^28204606447 is an apocalyptic number.

28204606447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28204606447 is an equidigital number, since it uses as much as digits as its factorization.

28204606447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 43.

The spelling of 28204606447 in words is "twenty-eight billion, two hundred four million, six hundred six thousand, four hundred forty-seven".