1322440240 has 80 divisors (see below), whose sum is σ = 3436092576. Its totient is φ = 469145600.

The previous prime is 1322440213. The next prime is 1322440247. The reversal of 1322440240 is 420442231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1322440247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17754 + ... + 54406.

Almost surely, 2^1322440240 is an apocalyptic number.

1322440240 is a gapful number since it is divisible by the number (10) 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 1322440240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718046288).

1322440240 is an abundant number, since it is smaller than the sum of its proper divisors (2113652336).

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

1322440240 is a wasteful number, since it uses less digits than its factorization.

1322440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36718 (or 36712 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1322440240 is about 36365.3714404239. The cubic root of 1322440240 is about 1097.6368663013.

Adding to 1322440240 its reverse (420442231), we get a palindrome (1742882471).

The spelling of 1322440240 in words is "one billion, three hundred twenty-two million, four hundred forty thousand, two hundred forty".