28131623083 has 4 divisors (see below), whose sum is σ = 28141000168. Its totient is φ = 28122246000.

The previous prime is 28131623071. The next prime is 28131623087. The reversal of 28131623083 is 38032613182.

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-28131623083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28131623087) 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, 4684041 + ... + 4690042.

It is an arithmetic number, because the mean of its divisors is an integer number (7035250042).

Almost surely, 2^28131623083 is an apocalyptic number.

28131623083 is a deficient number, since it is larger than the sum of its proper divisors (9377085).

28131623083 is an equidigital number, since it uses as much as digits as its factorization.

28131623083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9377084.

The product of its (nonzero) digits is 41472, while the sum is 37.

Subtracting 28131623083 from its reverse (38032613182), we obtain a palindrome (9900990099).

The spelling of 28131623083 in words is "twenty-eight billion, one hundred thirty-one million, six hundred twenty-three thousand, eighty-three".