28131304327 has 4 divisors (see below), whose sum is σ = 32150062096. Its totient is φ = 24112546560.

The previous prime is 28131304273. The next prime is 28131304337. The reversal of 28131304327 is 72340313182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28131304327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28131304292 and 28131304301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28131304337) 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, 2009378874 + ... + 2009378887.

It is an arithmetic number, because the mean of its divisors is an integer number (8037515524).

Almost surely, 2^28131304327 is an apocalyptic number.

28131304327 is a deficient number, since it is larger than the sum of its proper divisors (4018757769).

28131304327 is an equidigital number, since it uses as much as digits as its factorization.

28131304327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018757768.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 28131304327 in words is "twenty-eight billion, one hundred thirty-one million, three hundred four thousand, three hundred twenty-seven".