12422440 has 32 divisors (see below), whose sum is σ = 28917000. Its totient is φ = 4797184.

The previous prime is 12422437. The next prime is 12422441. The reversal of 12422440 is 4422421.

12422440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12124324 + 298116 = 3482^2 + 546^2 .

It is not an unprimeable number, because it can be changed into a prime (12422441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4195 + ... + 6514.

Almost surely, 2^12422440 is an apocalyptic number.

12422440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12422440 is an abundant number, since it is smaller than the sum of its proper divisors (16494560).

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

12422440 is a wasteful number, since it uses less digits than its factorization.

12422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10749 (or 10745 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 12422440 is about 3524.5481979964. The cubic root of 12422440 is about 231.5984432985.

Subtracting from 12422440 its sum of digits (19), we obtain a palindrome (12422421).

Adding to 12422440 its reverse (4422421), we get a palindrome (16844861).

The spelling of 12422440 in words is "twelve million, four hundred twenty-two thousand, four hundred forty".