28267803687 has 4 divisors (see below), whose sum is σ = 37690404920. Its totient is φ = 18845202456.

The previous prime is 28267803671. The next prime is 28267803701. The reversal of 28267803687 is 78630876282.

It is a happy number.

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

It is not a de Polignac number, because 28267803687 - 2⁴ = 28267803671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28267803787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4711300612 + ... + 4711300617.

It is an arithmetic number, because the mean of its divisors is an integer number (9422601230).

Almost surely, 2^28267803687 is an apocalyptic number.

28267803687 is a deficient number, since it is larger than the sum of its proper divisors (9422601233).

28267803687 is an equidigital number, since it uses as much as digits as its factorization.

28267803687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9422601232.

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 28267803687 in words is "twenty-eight billion, two hundred sixty-seven million, eight hundred three thousand, six hundred eighty-seven".