28245213613 has 8 divisors (see below), whose sum is σ = 29428842240. Its totient is φ = 27078615840.

The previous prime is 28245213599. The next prime is 28245213631. The reversal of 28245213613 is 31631254282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28245213613 - 2²⁵ = 28211659181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28245213713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4254328 + ... + 4260961.

It is an arithmetic number, because the mean of its divisors is an integer number (3678605280).

Almost surely, 2^28245213613 is an apocalyptic number.

It is an amenable number.

28245213613 is a deficient number, since it is larger than the sum of its proper divisors (1183628627).

28245213613 is a wasteful number, since it uses less digits than its factorization.

28245213613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515427.

The product of its digits is 69120, while the sum is 37.

Adding to 28245213613 its reverse (31631254282), we get a palindrome (59876467895).

It can be divided in two parts, 282452 and 13613, that added together give a triangular number (296065 = T₇₆₉).

The spelling of 28245213613 in words is "twenty-eight billion, two hundred forty-five million, two hundred thirteen thousand, six hundred thirteen".