22218884 has 24 divisors (see below), whose sum is σ = 40502616. Its totient is φ = 10656000.

The previous prime is 22218877. The next prime is 22218913. The reversal of 22218884 is 48881222.

It can be written as a sum of positive squares in 4 ways, for example, as 222784 + 21996100 = 472^2 + 4690^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8894 + ... + 11114.

It is an arithmetic number, because the mean of its divisors is an integer number (1687609).

Almost surely, 2^22218884 is an apocalyptic number.

It is an amenable number.

22218884 is a deficient number, since it is larger than the sum of its proper divisors (18283732).

22218884 is a wasteful number, since it uses less digits than its factorization.

22218884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2325 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 22218884 is about 4713.6911226766. The cubic root of 22218884 is about 281.1301432339.

It can be divided in two parts, 2221 and 8884, that multiplied together give a square (19731364 = 4442²).

The spelling of 22218884 in words is "twenty-two million, two hundred eighteen thousand, eight hundred eighty-four".