1340144311 has 16 divisors (see below), whose sum is σ = 1487299968. Its totient is φ = 1197364000.

The previous prime is 1340144303. The next prime is 1340144341. The reversal of 1340144311 is 1134410431.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1340144311 - 2³ = 1340144303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340144341) 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, 176136 + ... + 183586.

It is an arithmetic number, because the mean of its divisors is an integer number (92956248).

Almost surely, 2^1340144311 is an apocalyptic number.

1340144311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1340144311 is a deficient number, since it is larger than the sum of its proper divisors (147155657).

1340144311 is a wasteful number, since it uses less digits than its factorization.

1340144311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1340144311 is about 36607.9815204280. The cubic root of 1340144311 is about 1102.5133469177.

Adding to 1340144311 its reverse (1134410431), we get a palindrome (2474554742).

The spelling of 1340144311 in words is "one billion, three hundred forty million, one hundred forty-four thousand, three hundred eleven".