28681273285 has 8 divisors (see below), whose sum is σ = 39334317696. Its totient is φ = 19667158800.

The previous prime is 28681273249. The next prime is 28681273307. The reversal of 28681273285 is 58237218682.

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

It is not a de Polignac number, because 28681273285 - 2⁹ = 28681272773 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 409732441 + ... + 409732510.

It is an arithmetic number, because the mean of its divisors is an integer number (4916789712).

Almost surely, 2^28681273285 is an apocalyptic number.

It is an amenable number.

28681273285 is a deficient number, since it is larger than the sum of its proper divisors (10653044411).

28681273285 is an equidigital number, since it uses as much as digits as its factorization.

28681273285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819464963.

The product of its digits is 2580480, while the sum is 52.

The spelling of 28681273285 in words is "twenty-eight billion, six hundred eighty-one million, two hundred seventy-three thousand, two hundred eighty-five".