8321990 has 16 divisors (see below), whose sum is σ = 15014160. Its totient is φ = 3321120.

The previous prime is 8321987. The next prime is 8322001. The reversal of 8321990 is 991238.

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 7 ways as a sum of consecutive naturals, for example, 5981 + ... + 7239.

It is an arithmetic number, because the mean of its divisors is an integer number (938385).

Almost surely, 2^8321990 is an apocalyptic number.

8321990 is a deficient number, since it is larger than the sum of its proper divisors (6692170).

8321990 is a wasteful number, since it uses less digits than its factorization.

8321990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 8321990 is about 2884.7859539314. The cubic root of 8321990 is about 202.6480348224.

The spelling of 8321990 in words is "eight million, three hundred twenty-one thousand, nine hundred ninety".