82028881 has 4 divisors (see below), whose sum is σ = 89486064. Its totient is φ = 74571700.

The previous prime is 82028861. The next prime is 82028899. The reversal of 82028881 is 18882028.

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 82028881 - 2⁹ = 82028369 is a prime.

It is a super-2 number, since 2×82028881² = 13457474636224322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82028881.

It is not an unprimeable number, because it can be changed into a prime (82028801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3728575 + ... + 3728596.

It is an arithmetic number, because the mean of its divisors is an integer number (22371516).

Almost surely, 2^82028881 is an apocalyptic number.

It is an amenable number.

82028881 is a deficient number, since it is larger than the sum of its proper divisors (7457183).

82028881 is a wasteful number, since it uses less digits than its factorization.

82028881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457182.

The product of its (nonzero) digits is 16384, while the sum is 37.

The square root of 82028881 is about 9056.9796841994. The cubic root of 82028881 is about 434.4991478622.

The spelling of 82028881 in words is "eighty-two million, twenty-eight thousand, eight hundred eighty-one".