868866868 has 12 divisors (see below), whose sum is σ = 1522249092. Its totient is φ = 433938560.

The previous prime is 868866851. The next prime is 868866877. The reversal of 868866868 is 868668868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 492041124 + 376825744 = 22182^2 + 19412^2 .

It is a zygodrome in base 6.

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, 119755 + ... + 126802.

It is an arithmetic number, because the mean of its divisors is an integer number (126854091).

Almost surely, 2^868866868 is an apocalyptic number.

It is an amenable number.

868866868 is a deficient number, since it is larger than the sum of its proper divisors (653382224).

868866868 is a wasteful number, since it uses less digits than its factorization.

868866868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247442 (or 247440 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 64.

The square root of 868866868 is about 29476.5477625858. The cubic root of 868866868 is about 954.2256336125.

The spelling of 868866868 in words is "eight hundred sixty-eight million, eight hundred sixty-six thousand, eight hundred sixty-eight".