28501856727 has 4 divisors (see below), whose sum is σ = 38002475640. Its totient is φ = 19001237816.

The previous prime is 28501856683. The next prime is 28501856729. The reversal of 28501856727 is 72765810582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28501856727 - 2¹⁴ = 28501840343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28501856727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28501856729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4750309452 + ... + 4750309457.

It is an arithmetic number, because the mean of its divisors is an integer number (9500618910).

Almost surely, 2^28501856727 is an apocalyptic number.

28501856727 is a deficient number, since it is larger than the sum of its proper divisors (9500618913).

28501856727 is an equidigital number, since it uses as much as digits as its factorization.

28501856727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9500618912.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 28501856727 in words is "twenty-eight billion, five hundred one million, eight hundred fifty-six thousand, seven hundred twenty-seven".