28575729439 has 2 divisors, whose sum is σ = 28575729440. Its totient is φ = 28575729438.

The previous prime is 28575729433. The next prime is 28575729467. The reversal of 28575729439 is 93492757582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28575729439 - 2¹¹ = 28575727391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28575729433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14287864719 + 14287864720.

It is an arithmetic number, because the mean of its divisors is an integer number (14287864720).

Almost surely, 2^28575729439 is an apocalyptic number.

28575729439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28575729439 is an equidigital number, since it uses as much as digits as its factorization.

28575729439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38102400, while the sum is 61.

The spelling of 28575729439 in words is "twenty-eight billion, five hundred seventy-five million, seven hundred twenty-nine thousand, four hundred thirty-nine".