1268857834 has 8 divisors (see below), whose sum is σ = 1908034308. Its totient is φ = 632846400.

The previous prime is 1268857831. The next prime is 1268857841. The reversal of 1268857834 is 4387588621.

It can be written as a sum of positive squares in 2 ways, for example, as 1244325625 + 24532209 = 35275^2 + 4953^2 .

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

It is a super-2 number, since 2×1268857834² = 3220000405806343112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1268857831) by changing a digit.

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, 790257 + ... + 791860.

Almost surely, 2^1268857834 is an apocalyptic number.

1268857834 is a deficient number, since it is larger than the sum of its proper divisors (639176474).

1268857834 is a wasteful number, since it uses less digits than its factorization.

1268857834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582520.

The product of its digits is 2580480, while the sum is 52.

The square root of 1268857834 is about 35621.0307823903. The cubic root of 1268857834 is about 1082.6073928731.

The spelling of 1268857834 in words is "one billion, two hundred sixty-eight million, eight hundred fifty-seven thousand, eight hundred thirty-four".