22354140 has 48 divisors (see below), whose sum is σ = 63931392. Its totient is φ = 5833536.

The previous prime is 22354063. The next prime is 22354151. The reversal of 22354140 is 4145322.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1144 + ... + 6783.

It is an arithmetic number, because the mean of its divisors is an integer number (1331904).

Almost surely, 2^22354140 is an apocalyptic number.

22354140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22354140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31965696).

22354140 is an abundant number, since it is smaller than the sum of its proper divisors (41577252).

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

22354140 is a wasteful number, since it uses less digits than its factorization.

22354140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7986 (or 7984 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 22354140 is about 4728.0164974331. The cubic root of 22354140 is about 281.6994433728.

Adding to 22354140 its reverse (4145322), we get a palindrome (26499462).

The spelling of 22354140 in words is "twenty-two million, three hundred fifty-four thousand, one hundred forty".