28833734881 has 16 divisors (see below), whose sum is σ = 35087328000. Its totient is φ = 23640074304.

The previous prime is 28833734843. The next prime is 28833734893. The reversal of 28833734881 is 18843733882.

It is not a de Polignac number, because 28833734881 - 2¹¹ = 28833732833 is a prime.

It is a super-2 number, since 2×28833734881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28833734821) 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, 1819576 + ... + 1835353.

It is an arithmetic number, because the mean of its divisors is an integer number (2192958000).

Almost surely, 2^28833734881 is an apocalyptic number.

It is an amenable number.

28833734881 is a deficient number, since it is larger than the sum of its proper divisors (6253593119).

28833734881 is an equidigital number, since it uses as much as digits as its factorization.

28833734881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654973 (or 3654959 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 55.

Subtracting from 28833734881 its reverse (18843733882), we obtain a palindrome (9990000999).

The spelling of 28833734881 in words is "twenty-eight billion, eight hundred thirty-three million, seven hundred thirty-four thousand, eight hundred eighty-one".