868221868 has 6 divisors (see below), whose sum is σ = 1519388276. Its totient is φ = 434110932.

The previous prime is 868221859. The next prime is 868221881. The reversal of 868221868 is 868122868.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108527730 + ... + 108527737.

Almost surely, 2^868221868 is an apocalyptic number.

It is an amenable number.

868221868 is a deficient number, since it is larger than the sum of its proper divisors (651166408).

868221868 is a wasteful number, since it uses less digits than its factorization.

868221868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217055471 (or 217055469 counting only the distinct ones).

The product of its digits is 589824, while the sum is 49.

The square root of 868221868 is about 29465.6048300387. The cubic root of 868221868 is about 953.9894532425.

The spelling of 868221868 in words is "eight hundred sixty-eight million, two hundred twenty-one thousand, eight hundred sixty-eight".