28285254231 has 16 divisors (see below), whose sum is σ = 40727877120. Its totient is φ = 17357816160.

The previous prime is 28285254227. The next prime is 28285254241. The reversal of 28285254231 is 13245258282.

It is not a de Polignac number, because 28285254231 - 2² = 28285254227 is a prime.

It is a super-2 number, since 2×28285254231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285254241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 996115 + ... + 1024116.

It is an arithmetic number, because the mean of its divisors is an integer number (2545492320).

Almost surely, 2^28285254231 is an apocalyptic number.

28285254231 is a deficient number, since it is larger than the sum of its proper divisors (12442622889).

28285254231 is a wasteful number, since it uses less digits than its factorization.

28285254231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020606.

The product of its digits is 307200, while the sum is 42.

The spelling of 28285254231 in words is "twenty-eight billion, two hundred eighty-five million, two hundred fifty-four thousand, two hundred thirty-one".