1340347258 has 8 divisors (see below), whose sum is σ = 2011686228. Its totient is φ = 669785184.

The previous prime is 1340347249. The next prime is 1340347271. The reversal of 1340347258 is 8527430431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1321831449 + 18515809 = 36357^2 + 4303^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 189891 + ... + 196822.

Almost surely, 2^1340347258 is an apocalyptic number.

1340347258 is a deficient number, since it is larger than the sum of its proper divisors (671338970).

1340347258 is a wasteful number, since it uses less digits than its factorization.

1340347258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388448.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 1340347258 is about 36610.7533110151. The cubic root of 1340347258 is about 1102.5689977609.

Adding to 1340347258 its reverse (8527430431), we get a palindrome (9867777689).

The spelling of 1340347258 in words is "one billion, three hundred forty million, three hundred forty-seven thousand, two hundred fifty-eight".