22140356 has 72 divisors (see below), whose sum is σ = 48033216. Its totient is φ = 8890560.

The previous prime is 22140353. The next prime is 22140361. The reversal of 22140356 is 65304122.

It is not an unprimeable number, because it can be changed into a prime (22140353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311801 + ... + 311871.

It is an arithmetic number, because the mean of its divisors is an integer number (667128).

Almost surely, 2^22140356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22140356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24016608).

22140356 is an abundant number, since it is smaller than the sum of its proper divisors (25892860).

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

22140356 is a wasteful number, since it uses less digits than its factorization.

22140356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 22140356 is about 4705.3539718070. The cubic root of 22140356 is about 280.7985537110.

Adding to 22140356 its reverse (65304122), we get a palindrome (87444478).

The spelling of 22140356 in words is "twenty-two million, one hundred forty thousand, three hundred fifty-six".