28827441881 has 4 divisors (see below), whose sum is σ = 32945647872. Its totient is φ = 24709235892.

The previous prime is 28827441871. The next prime is 28827441889. The reversal of 28827441881 is 18814472882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28827441881 - 2²² = 28823247577 is a prime.

It is a super-2 number, since 2×28827441881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28827441889) 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 in 3 ways as a sum of consecutive naturals, for example, 2059102985 + ... + 2059102998.

It is an arithmetic number, because the mean of its divisors is an integer number (8236411968).

Almost surely, 2^28827441881 is an apocalyptic number.

It is an amenable number.

28827441881 is a deficient number, since it is larger than the sum of its proper divisors (4118205991).

28827441881 is an equidigital number, since it uses as much as digits as its factorization.

28827441881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118205990.

The product of its digits is 1835008, while the sum is 53.

The spelling of 28827441881 in words is "twenty-eight billion, eight hundred twenty-seven million, four hundred forty-one thousand, eight hundred eighty-one".