28718536369 has 4 divisors (see below), whose sum is σ = 29644940800. Its totient is φ = 27792131940.

The previous prime is 28718536349. The next prime is 28718536397. The reversal of 28718536369 is 96363581782.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28718536369 is a prime.

It is a super-2 number, since 2×28718536369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28718536349) 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, 463202169 + ... + 463202230.

It is an arithmetic number, because the mean of its divisors is an integer number (7411235200).

Almost surely, 2^28718536369 is an apocalyptic number.

It is an amenable number.

28718536369 is a deficient number, since it is larger than the sum of its proper divisors (926404431).

28718536369 is an equidigital number, since it uses as much as digits as its factorization.

28718536369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926404430.

The product of its digits is 13063680, while the sum is 58.

The spelling of 28718536369 in words is "twenty-eight billion, seven hundred eighteen million, five hundred thirty-six thousand, three hundred sixty-nine".