22220240 has 40 divisors (see below), whose sum is σ = 59043840. Its totient is φ = 7618176.

The previous prime is 22220227. The next prime is 22220249. The reversal of 22220240 is 4202222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220249) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19280 + ... + 20399.

It is an arithmetic number, because the mean of its divisors is an integer number (1476096).

Almost surely, 2^22220240 is an apocalyptic number.

22220240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220240 is an abundant number, since it is smaller than the sum of its proper divisors (36823600).

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

22220240 is a wasteful number, since it uses less digits than its factorization.

22220240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39699 (or 39693 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 22220240 is about 4713.8349568053. The cubic root of 22220240 is about 281.1358621638.

Adding to 22220240 its reverse (4202222), we get a palindrome (26422462).

The spelling of 22220240 in words is "twenty-two million, two hundred twenty thousand, two hundred forty".