8221994 has 16 divisors (see below), whose sum is σ = 14040000. Its totient is φ = 3574560.

The previous prime is 8221991. The next prime is 8222009. The reversal of 8221994 is 4991228.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8221991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7619 + ... + 8630.

It is an arithmetic number, because the mean of its divisors is an integer number (877500).

Almost surely, 2^8221994 is an apocalyptic number.

8221994 is a deficient number, since it is larger than the sum of its proper divisors (5818006).

8221994 is a wasteful number, since it uses less digits than its factorization.

8221994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16285.

The product of its digits is 10368, while the sum is 35.

The square root of 8221994 is about 2867.4019599631. The cubic root of 8221994 is about 201.8330974384.

The spelling of 8221994 in words is "eight million, two hundred twenty-one thousand, nine hundred ninety-four".