28291588671 has 4 divisors (see below), whose sum is σ = 37722118232. Its totient is φ = 18861059112.

The previous prime is 28291588669. The next prime is 28291588723. The reversal of 28291588671 is 17688519282.

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

It is not a de Polignac number, because 28291588671 - 2¹ = 28291588669 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 (28291588271) 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, 4715264776 + ... + 4715264781.

It is an arithmetic number, because the mean of its divisors is an integer number (9430529558).

Almost surely, 2^28291588671 is an apocalyptic number.

28291588671 is a deficient number, since it is larger than the sum of its proper divisors (9430529561).

28291588671 is an equidigital number, since it uses as much as digits as its factorization.

28291588671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9430529560.

The product of its digits is 3870720, while the sum is 57.

The spelling of 28291588671 in words is "twenty-eight billion, two hundred ninety-one million, five hundred eighty-eight thousand, six hundred seventy-one".