1340839946 has 16 divisors (see below), whose sum is σ = 2133864000. Its totient is φ = 629711040.

The previous prime is 1340839939. The next prime is 1340839949. The reversal of 1340839946 is 6499380431.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340839946.

It is not an unprimeable number, because it can be changed into a prime (1340839949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22550 + ... + 56481.

It is an arithmetic number, because the mean of its divisors is an integer number (133366500).

Almost surely, 2^1340839946 is an apocalyptic number.

1340839946 is a deficient number, since it is larger than the sum of its proper divisors (793024054).

1340839946 is a wasteful number, since it uses less digits than its factorization.

1340839946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79549.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 1340839946 is about 36617.4814262259. The cubic root of 1340839946 is about 1102.7040761805.

The spelling of 1340839946 in words is "one billion, three hundred forty million, eight hundred thirty-nine thousand, nine hundred forty-six".