28285105247 has 8 divisors (see below), whose sum is σ = 32645893152. Its totient is φ = 24004332000.

The previous prime is 28285105237. The next prime is 28285105259. The reversal of 28285105247 is 74250158282.

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 28285105247 - 2¹² = 28285101151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28285105198 and 28285105207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285105237) 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, 20002904 + ... + 20004317.

It is an arithmetic number, because the mean of its divisors is an integer number (4080736644).

Almost surely, 2^28285105247 is an apocalyptic number.

28285105247 is a deficient number, since it is larger than the sum of its proper divisors (4360787905).

28285105247 is a wasteful number, since it uses less digits than its factorization.

28285105247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40007329.

The product of its (nonzero) digits is 358400, while the sum is 44.

The spelling of 28285105247 in words is "twenty-eight billion, two hundred eighty-five million, one hundred five thousand, two hundred forty-seven".