28236227613 has 12 divisors (see below), whose sum is σ = 41382020064. Its totient is φ = 17112865000.

The previous prime is 28236227599. The next prime is 28236227623. The reversal of 28236227613 is 31672263282.

It is not a de Polignac number, because 28236227613 - 2¹² = 28236223517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28236227623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38892513 + ... + 38893238.

It is an arithmetic number, because the mean of its divisors is an integer number (3448501672).

Almost surely, 2^28236227613 is an apocalyptic number.

It is an amenable number.

28236227613 is a deficient number, since it is larger than the sum of its proper divisors (13145792451).

28236227613 is a wasteful number, since it uses less digits than its factorization.

28236227613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77785776 (or 77785765 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The spelling of 28236227613 in words is "twenty-eight billion, two hundred thirty-six million, two hundred twenty-seven thousand, six hundred thirteen".