1340711440 has 40 divisors (see below), whose sum is σ = 3281218560. Its totient is φ = 508058496.

The previous prime is 1340711431. The next prime is 1340711461. The reversal of 1340711440 is 441170431.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439504 + ... + 442543.

It is an arithmetic number, because the mean of its divisors is an integer number (82030464).

Almost surely, 2^1340711440 is an apocalyptic number.

1340711440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340711440 is an abundant number, since it is smaller than the sum of its proper divisors (1940507120).

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

1340711440 is a wasteful number, since it uses less digits than its factorization.

1340711440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882079 (or 882073 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1340711440 is about 36615.7266758424. The cubic root of 1340711440 is about 1102.6688473630.

Adding to 1340711440 its reverse (441170431), we get a palindrome (1781881871).

The spelling of 1340711440 in words is "one billion, three hundred forty million, seven hundred eleven thousand, four hundred forty".