22222008 has 24 divisors (see below), whose sum is σ = 60184800. Its totient is φ = 7407312.

The previous prime is 22221977. The next prime is 22222049. The reversal of 22222008 is 80022222.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 154248 + ... + 154391.

It is an arithmetic number, because the mean of its divisors is an integer number (2507700).

Almost surely, 2^22222008 is an apocalyptic number.

It is an amenable number.

22222008 is an abundant number, since it is smaller than the sum of its proper divisors (37962792).

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

22222008 is a wasteful number, since it uses less digits than its factorization.

22222008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308651 (or 308644 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 22222008 is about 4714.0224861577. The cubic root of 22222008 is about 281.1433183542.

The spelling of 22222008 in words is "twenty-two million, two hundred twenty-two thousand, eight".