821283368 has 16 divisors (see below), whose sum is σ = 1559400000. Its totient is φ = 405443376.

The previous prime is 821283349. The next prime is 821283373. The reversal of 821283368 is 863382128.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649118 + ... + 650381.

It is an arithmetic number, because the mean of its divisors is an integer number (97462500).

Almost surely, 2^821283368 is an apocalyptic number.

It is an amenable number.

821283368 is a deficient number, since it is larger than the sum of its proper divisors (738116632).

821283368 is a wasteful number, since it uses less digits than its factorization.

821283368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299584 (or 1299580 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 821283368 is about 28658.0419428823. The cubic root of 821283368 is about 936.4782085326.

The spelling of 821283368 in words is "eight hundred twenty-one million, two hundred eighty-three thousand, three hundred sixty-eight".