22340142 has 48 divisors (see below), whose sum is σ = 55918512. Its totient is φ = 6370560.

The previous prime is 22340141. The next prime is 22340147. The reversal of 22340142 is 24104322.

22340142 is a `hidden beast` number, since 223 + 401 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22340141) 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, 48 + ... + 6684.

It is an arithmetic number, because the mean of its divisors is an integer number (1164969).

Almost surely, 2^22340142 is an apocalyptic number.

22340142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22340142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27959256).

22340142 is an abundant number, since it is smaller than the sum of its proper divisors (33578370).

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

22340142 is a wasteful number, since it uses less digits than its factorization.

22340142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673 (or 6670 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22340142 is about 4726.5359408345. The cubic root of 22340142 is about 281.6406317140.

Adding to 22340142 its reverse (24104322), we get a palindrome (46444464).

The spelling of 22340142 in words is "twenty-two million, three hundred forty thousand, one hundred forty-two".