868028020 has 12 divisors (see below), whose sum is σ = 1822858884. Its totient is φ = 347211200.

The previous prime is 868028009. The next prime is 868028039. The reversal of 868028020 is 20820868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 434472336 + 433555684 = 20844^2 + 20822^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21700681 + ... + 21700720.

It is an arithmetic number, because the mean of its divisors is an integer number (151904907).

Almost surely, 2^868028020 is an apocalyptic number.

It is an amenable number.

868028020 is an abundant number, since it is smaller than the sum of its proper divisors (954830864).

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

868028020 is a wasteful number, since it uses less digits than its factorization.

868028020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43401410 (or 43401408 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 868028020 is about 29462.3152518603. The cubic root of 868028020 is about 953.9184488448.

Adding to 868028020 its reverse (20820868), we get a palindrome (888848888).

The spelling of 868028020 in words is "eight hundred sixty-eight million, twenty-eight thousand, twenty".