28252442593 has 4 divisors (see below), whose sum is σ = 28254348720. Its totient is φ = 28250536468.

The previous prime is 28252442591. The next prime is 28252442599. The reversal of 28252442593 is 39524425282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39524425282 = 2 ⋅19762212641.

It is a cyclic number.

It is not a de Polignac number, because 28252442593 - 2¹ = 28252442591 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28252442591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930655 + ... + 960532.

It is an arithmetic number, because the mean of its divisors is an integer number (7063587180).

Almost surely, 2^28252442593 is an apocalyptic number.

It is an amenable number.

28252442593 is a deficient number, since it is larger than the sum of its proper divisors (1906127).

28252442593 is a wasteful number, since it uses less digits than its factorization.

28252442593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906126.

The product of its digits is 1382400, while the sum is 46.

The spelling of 28252442593 in words is "twenty-eight billion, two hundred fifty-two million, four hundred forty-two thousand, five hundred ninety-three".