28281235835 has 8 divisors (see below), whose sum is σ = 34044543216. Its totient is φ = 22553615200.

The previous prime is 28281235789. The next prime is 28281235859. The reversal of 28281235835 is 53853218282.

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

It is not a de Polignac number, because 28281235835 - 2¹⁰ = 28281234811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28281235835.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8919941 + ... + 8923110.

It is an arithmetic number, because the mean of its divisors is an integer number (4255567902).

Almost surely, 2^28281235835 is an apocalyptic number.

28281235835 is a deficient number, since it is larger than the sum of its proper divisors (5763307381).

28281235835 is a wasteful number, since it uses less digits than its factorization.

28281235835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17843373.

The product of its digits is 921600, while the sum is 47.

The spelling of 28281235835 in words is "twenty-eight billion, two hundred eighty-one million, two hundred thirty-five thousand, eight hundred thirty-five".