22220008 has 8 divisors (see below), whose sum is σ = 41662530. Its totient is φ = 11110000.

The previous prime is 22219999. The next prime is 22220027. The reversal of 22220008 is 80002222.

It can be written as a sum of positive squares in only one way, i.e., 21511044 + 708964 = 4638^2 + 842^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 22219973 and 22220000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388743 + ... + 1388758.

Almost surely, 2^22220008 is an apocalyptic number.

It is an amenable number.

22220008 is a deficient number, since it is larger than the sum of its proper divisors (19442522).

22220008 is a wasteful number, since it uses less digits than its factorization.

22220008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777507 (or 2777503 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 22220008 is about 4713.8103483276. The cubic root of 22220008 is about 281.1348837203.

The spelling of 22220008 in words is "twenty-two million, two hundred twenty thousand, eight".