1340344778 has 16 divisors (see below), whose sum is σ = 2161365120. Its totient is φ = 621390816.

The previous prime is 1340344763. The next prime is 1340344793. The reversal of 1340344778 is 8774430431.

It is an interprime number because it is at equal distance from previous prime (1340344763) and next prime (1340344793).

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, 373451 + ... + 377022.

It is an arithmetic number, because the mean of its divisors is an integer number (135085320).

Almost surely, 2^1340344778 is an apocalyptic number.

1340344778 is a deficient number, since it is larger than the sum of its proper divisors (821020342).

1340344778 is a wasteful number, since it uses less digits than its factorization.

1340344778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750541.

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 1340344778 is about 36610.7194411691. The cubic root of 1340344778 is about 1102.5683177448.

The spelling of 1340344778 in words is "one billion, three hundred forty million, three hundred forty-four thousand, seven hundred seventy-eight".