1344243440 has 20 divisors (see below), whose sum is σ = 3125366184. Its totient is φ = 537697344.

The previous prime is 1344243437. The next prime is 1344243443. The reversal of 1344243440 is 443424431.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1344243437) and next prime (1344243443).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344243443) 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, 8401442 + ... + 8401601.

Almost surely, 2^1344243440 is an apocalyptic number.

1344243440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1344243440 is an abundant number, since it is smaller than the sum of its proper divisors (1781122744).

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

1344243440 is a wasteful number, since it uses less digits than its factorization.

1344243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16803056 (or 16803050 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 1344243440 is about 36663.9255945132. The cubic root of 1344243440 is about 1103.6362967384.

Adding to 1344243440 its reverse (443424431), we get a palindrome (1787667871).

The spelling of 1344243440 in words is "one billion, three hundred forty-four million, two hundred forty-three thousand, four hundred forty".