22434140 has 12 divisors (see below), whose sum is σ = 47111736. Its totient is φ = 8973648.

The previous prime is 22434133. The next prime is 22434149. The reversal of 22434140 is 4143422.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1121707 = 22434140 / (2 + 2 + 4 + 3 + 4 + 1 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22434149) 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, 560834 + ... + 560873.

It is an arithmetic number, because the mean of its divisors is an integer number (3925978).

Almost surely, 2^22434140 is an apocalyptic number.

22434140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22434140 is an abundant number, since it is smaller than the sum of its proper divisors (24677596).

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

22434140 is a wasteful number, since it uses less digits than its factorization.

22434140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121716 (or 1121714 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22434140 is about 4736.4691490603. The cubic root of 22434140 is about 282.0350877656.

Adding to 22434140 its reverse (4143422), we get a palindrome (26577562).

The spelling of 22434140 in words is "twenty-two million, four hundred thirty-four thousand, one hundred forty".