28135294889 has 8 divisors (see below), whose sum is σ = 30726303552. Its totient is φ = 25605251280.

The previous prime is 28135294883. The next prime is 28135295009. The reversal of 28135294889 is 98849253182.

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 28135294889 - 2⁸ = 28135294633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28135294883) 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, 15240299 + ... + 15242144.

It is an arithmetic number, because the mean of its divisors is an integer number (3840787944).

Almost surely, 2^28135294889 is an apocalyptic number.

It is an amenable number.

28135294889 is a deficient number, since it is larger than the sum of its proper divisors (2591008663).

28135294889 is a wasteful number, since it uses less digits than its factorization.

28135294889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30482527.

The product of its digits is 9953280, while the sum is 59.

The spelling of 28135294889 in words is "twenty-eight billion, one hundred thirty-five million, two hundred ninety-four thousand, eight hundred eighty-nine".