22220538 has 16 divisors (see below), whose sum is σ = 46780320. Its totient is φ = 7016976.

The previous prime is 22220537. The next prime is 22220603. The reversal of 22220538 is 83502222.

It is not an unprimeable number, because it can be changed into a prime (22220533) 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, 97345 + ... + 97572.

It is an arithmetic number, because the mean of its divisors is an integer number (2923770).

Almost surely, 2^22220538 is an apocalyptic number.

22220538 is an abundant number, since it is smaller than the sum of its proper divisors (24559782).

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

22220538 is a wasteful number, since it uses less digits than its factorization.

22220538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194941.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 22220538 is about 4713.8665657823. The cubic root of 22220538 is about 281.1371189476.

The spelling of 22220538 in words is "twenty-two million, two hundred twenty thousand, five hundred thirty-eight".