28895371231 has 2 divisors, whose sum is σ = 28895371232. Its totient is φ = 28895371230.

The previous prime is 28895371177. The next prime is 28895371259. The reversal of 28895371231 is 13217359882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28895371231 - 2²³ = 28886982623 is a prime.

It is a super-2 number, since 2×28895371231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28895371261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14447685615 + 14447685616.

It is an arithmetic number, because the mean of its divisors is an integer number (14447685616).

Almost surely, 2^28895371231 is an apocalyptic number.

28895371231 is a deficient number, since it is larger than the sum of its proper divisors (1).

28895371231 is an equidigital number, since it uses as much as digits as its factorization.

28895371231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The spelling of 28895371231 in words is "twenty-eight billion, eight hundred ninety-five million, three hundred seventy-one thousand, two hundred thirty-one".