8321816 has 8 divisors (see below), whose sum is σ = 15603420. Its totient is φ = 4160904.

The previous prime is 8321813. The next prime is 8321843. The reversal of 8321816 is 6181238.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8321813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520106 + ... + 520121.

Almost surely, 2^8321816 is an apocalyptic number.

It is an amenable number.

8321816 is a deficient number, since it is larger than the sum of its proper divisors (7281604).

8321816 is a wasteful number, since it uses less digits than its factorization.

8321816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040233 (or 1040229 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 8321816 is about 2884.7557955571. The cubic root of 8321816 is about 202.6466224598.

The spelling of 8321816 in words is "eight million, three hundred twenty-one thousand, eight hundred sixteen".