22223840 has 24 divisors (see below), whose sum is σ = 52504200. Its totient is φ = 8889472.

The previous prime is 22223837. The next prime is 22223849. The reversal of 22223840 is 4832222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22223849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69290 + ... + 69609.

It is an arithmetic number, because the mean of its divisors is an integer number (2187675).

Almost surely, 2^22223840 is an apocalyptic number.

22223840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22223840 is an abundant number, since it is smaller than the sum of its proper divisors (30280360).

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

22223840 is a wasteful number, since it uses less digits than its factorization.

22223840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138914 (or 138906 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 22223840 is about 4714.2167960330. The cubic root of 22223840 is about 281.1510440348.

The spelling of 22223840 in words is "twenty-two million, two hundred twenty-three thousand, eight hundred forty".