22220140 has 12 divisors (see below), whose sum is σ = 46662336. Its totient is φ = 8888048.

The previous prime is 22220137. The next prime is 22220147. The reversal of 22220140 is 4102222.

It is a self number, because there is not a number n which added to its sum of digits gives 22220140.

It is not an unprimeable number, because it can be changed into a prime (22220147) 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, 555484 + ... + 555523.

It is an arithmetic number, because the mean of its divisors is an integer number (3888528).

Almost surely, 2^22220140 is an apocalyptic number.

22220140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220140 is an abundant number, since it is smaller than the sum of its proper divisors (24442196).

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

22220140 is a wasteful number, since it uses less digits than its factorization.

22220140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111016 (or 1111014 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22220140 is about 4713.8243497186. The cubic root of 22220140 is about 281.1354404218.

Adding to 22220140 its reverse (4102222), we get a palindrome (26322362).

The spelling of 22220140 in words is "twenty-two million, two hundred twenty thousand, one hundred forty".