28726243705 has 16 divisors (see below), whose sum is σ = 35427752640. Its totient is φ = 22344351552.

The previous prime is 28726243703. The next prime is 28726243709. The reversal of 28726243705 is 50734262782.

It is a cyclic number.

It is not a de Polignac number, because 28726243705 - 2¹ = 28726243703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28726243703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216702 + ... + 323128.

It is an arithmetic number, because the mean of its divisors is an integer number (2214234540).

Almost surely, 2^28726243705 is an apocalyptic number.

It is an amenable number.

28726243705 is a deficient number, since it is larger than the sum of its proper divisors (6701508935).

28726243705 is a wasteful number, since it uses less digits than its factorization.

28726243705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107928.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 28726243705 in words is "twenty-eight billion, seven hundred twenty-six million, two hundred forty-three thousand, seven hundred five".