82880020 has 12 divisors (see below), whose sum is σ = 174048084. Its totient is φ = 33152000.

The previous prime is 82880011. The next prime is 82880027. The reversal of 82880020 is 2008828.

It can be written as a sum of positive squares in 2 ways, for example, as 40525956 + 42354064 = 6366^2 + 6508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82880027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071981 + ... + 2072020.

It is an arithmetic number, because the mean of its divisors is an integer number (14504007).

Almost surely, 2^82880020 is an apocalyptic number.

It is an amenable number.

82880020 is an abundant number, since it is smaller than the sum of its proper divisors (91168064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82880020 is a wasteful number, since it uses less digits than its factorization.

82880020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144010 (or 4144008 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 82880020 is about 9103.8464398297. The cubic root of 82880020 is about 435.9967805503.

Adding to 82880020 its reverse (2008828), we get a palindrome (84888848).

The spelling of 82880020 in words is "eighty-two million, eight hundred eighty thousand, twenty".