28135716227 has 8 divisors (see below), whose sum is σ = 30125487600. Its totient is φ = 26183137024.

The previous prime is 28135716199. The next prime is 28135716229. The reversal of 28135716227 is 72261753182.

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 28135716227 - 2⁶ = 28135716163 is a prime.

It is a super-2 number, since 2×28135716227² (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 (28135716229) 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, 9296477 + ... + 9299502.

It is an arithmetic number, because the mean of its divisors is an integer number (3765685950).

Almost surely, 2^28135716227 is an apocalyptic number.

28135716227 is a deficient number, since it is larger than the sum of its proper divisors (1989771373).

28135716227 is a wasteful number, since it uses less digits than its factorization.

28135716227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18596085.

The product of its digits is 282240, while the sum is 44.

The spelling of 28135716227 in words is "twenty-eight billion, one hundred thirty-five million, seven hundred sixteen thousand, two hundred twenty-seven".