821334868 has 24 divisors (see below), whose sum is σ = 1493614080. Its totient is φ = 394716000.

The previous prime is 821334791. The next prime is 821334893. The reversal of 821334868 is 868433128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9993 + ... + 41743.

It is an arithmetic number, because the mean of its divisors is an integer number (62233920).

Almost surely, 2^821334868 is an apocalyptic number.

It is an amenable number.

821334868 is a deficient number, since it is larger than the sum of its proper divisors (672279212).

821334868 is a wasteful number, since it uses less digits than its factorization.

821334868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32007 (or 32005 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 821334868 is about 28658.9404549435. The cubic root of 821334868 is about 936.4977826209.

The spelling of 821334868 in words is "eight hundred twenty-one million, three hundred thirty-four thousand, eight hundred sixty-eight".