1268209439 has 8 divisors (see below), whose sum is σ = 1463454720. Its totient is φ = 1076482296.

The previous prime is 1268209403. The next prime is 1268209483. The reversal of 1268209439 is 9349028621.

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

It is a cyclic number.

It is not a de Polignac number, because 1268209439 - 2⁸ = 1268209183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1268209439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268209139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 878759 + ... + 880200.

It is an arithmetic number, because the mean of its divisors is an integer number (182931840).

Almost surely, 2^1268209439 is an apocalyptic number.

1268209439 is a deficient number, since it is larger than the sum of its proper divisors (195245281).

1268209439 is a wasteful number, since it uses less digits than its factorization.

1268209439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759069.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1268209439 is about 35611.9283246499. The cubic root of 1268209439 is about 1082.4229548680.

The spelling of 1268209439 in words is "one billion, two hundred sixty-eight million, two hundred nine thousand, four hundred thirty-nine".