28565740139 has 4 divisors (see below), whose sum is σ = 28580383680. Its totient is φ = 28551096600.

The previous prime is 28565740127. The next prime is 28565740153. The reversal of 28565740139 is 93104756582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93104756582 = 2 ⋅46552378291.

It is a cyclic number.

It is not a de Polignac number, because 28565740139 - 2²⁰ = 28564691563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28565740039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7318844 + ... + 7322745.

It is an arithmetic number, because the mean of its divisors is an integer number (7145095920).

It is a 1-persistent number, because it is pandigital, but 2⋅28565740139 = 57131480278 is not.

Almost surely, 2^28565740139 is an apocalyptic number.

28565740139 is a deficient number, since it is larger than the sum of its proper divisors (14643541).

28565740139 is a wasteful number, since it uses less digits than its factorization.

28565740139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14643540.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 28565740139 in words is "twenty-eight billion, five hundred sixty-five million, seven hundred forty thousand, one hundred thirty-nine".