1340420444 has 24 divisors (see below), whose sum is σ = 2568050688. Its totient is φ = 607123440.

The previous prime is 1340420443. The next prime is 1340420447. The reversal of 1340420444 is 4440240431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340420441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41372 + ... + 66275.

It is an arithmetic number, because the mean of its divisors is an integer number (107002112).

Almost surely, 2^1340420444 is an apocalyptic number.

It is an amenable number.

1340420444 is a deficient number, since it is larger than the sum of its proper divisors (1227630244).

1340420444 is a wasteful number, since it uses less digits than its factorization.

1340420444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107945 (or 107943 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 1340420444 is about 36611.7528124508. The cubic root of 1340420444 is about 1102.5890649849.

Adding to 1340420444 its reverse (4440240431), we get a palindrome (5780660875).

The spelling of 1340420444 in words is "one billion, three hundred forty million, four hundred twenty thousand, four hundred forty-four".