28858885881 has 48 divisors (see below), whose sum is σ = 44969453568. Its totient is φ = 16125832800.

The previous prime is 28858885751. The next prime is 28858885897. The reversal of 28858885881 is 18858885882.

It is not a de Polignac number, because 28858885881 - 2⁹ = 28858885369 is a prime.

It is a super-2 number, since 2×28858885881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28858885481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15423376 + ... + 15425246.

It is an arithmetic number, because the mean of its divisors is an integer number (936863616).

Almost surely, 2^28858885881 is an apocalyptic number.

28858885881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28858885881 is a deficient number, since it is larger than the sum of its proper divisors (16110567687).

28858885881 is a wasteful number, since it uses less digits than its factorization.

28858885881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210 (or 2151 counting only the distinct ones).

The product of its digits is 104857600, while the sum is 69.

Subtracting from 28858885881 its reverse (18858885882), we obtain a palindrome (9999999999).

The spelling of 28858885881 in words is "twenty-eight billion, eight hundred fifty-eight million, eight hundred eighty-five thousand, eight hundred eighty-one".