28135294887 has 8 divisors (see below), whose sum is σ = 42872830336. Its totient is φ = 16077311352.

The previous prime is 28135294883. The next prime is 28135295009. The reversal of 28135294887 is 78849253182.

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

It is not a de Polignac number, because 28135294887 - 2² = 28135294883 is a prime.

It is a congruent 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, 669887953 + ... + 669887994.

It is an arithmetic number, because the mean of its divisors is an integer number (5359103792).

Almost surely, 2^28135294887 is an apocalyptic number.

28135294887 is a deficient number, since it is larger than the sum of its proper divisors (14737535449).

28135294887 is a wasteful number, since it uses less digits than its factorization.

28135294887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339775957.

The product of its digits is 7741440, while the sum is 57.

The spelling of 28135294887 in words is "twenty-eight billion, one hundred thirty-five million, two hundred ninety-four thousand, eight hundred eighty-seven".