1340012638 has 8 divisors (see below), whose sum is σ = 2013735960. Its totient is φ = 668767320.

The previous prime is 1340012633. The next prime is 1340012651. The reversal of 1340012638 is 8362100431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340012633) 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, 618148 + ... + 620311.

It is an arithmetic number, because the mean of its divisors is an integer number (251716995).

Almost surely, 2^1340012638 is an apocalyptic number.

1340012638 is a deficient number, since it is larger than the sum of its proper divisors (673723322).

1340012638 is a wasteful number, since it uses less digits than its factorization.

1340012638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239002.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1340012638 is about 36606.1830569646. The cubic root of 1340012638 is about 1102.4772373750.

The spelling of 1340012638 in words is "one billion, three hundred forty million, twelve thousand, six hundred thirty-eight".