22220004 has 12 divisors (see below), whose sum is σ = 51846704. Its totient is φ = 7406664.

The previous prime is 22219999. The next prime is 22220027. The reversal of 22220004 is 40002222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1851667 = 22220004 / (2 + 2 + 2 + 2 + 0 + 0 + 0 + 4).

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 in 3 ways as a sum of consecutive naturals, for example, 925822 + ... + 925845.

Almost surely, 2^22220004 is an apocalyptic number.

It is an amenable number.

22220004 is an abundant number, since it is smaller than the sum of its proper divisors (29626700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22220004 is a wasteful number, since it uses less digits than its factorization.

22220004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851674 (or 1851672 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22220004 is about 4713.8099240423. The cubic root of 22220004 is about 281.1348668506.

Adding to 22220004 its reverse (40002222), we get a palindrome (62222226).

The spelling of 22220004 in words is "twenty-two million, two hundred twenty thousand, four".