1268857835 has 32 divisors (see below), whose sum is σ = 1817579520. Its totient is φ = 832159872.

The previous prime is 1268857831. The next prime is 1268857841. The reversal of 1268857835 is 5387588621.

It is a cyclic number.

It is not a de Polignac number, because 1268857835 - 2² = 1268857831 is a prime.

It is a super-2 number, since 2×1268857835² = 3220000410881774450, 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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68102 + ... + 84708.

It is an arithmetic number, because the mean of its divisors is an integer number (56799360).

Almost surely, 2^1268857835 is an apocalyptic number.

1268857835 is a deficient number, since it is larger than the sum of its proper divisors (548721685).

1268857835 is a wasteful number, since it uses less digits than its factorization.

1268857835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16715.

The product of its digits is 3225600, while the sum is 53.

The square root of 1268857835 is about 35621.0307964270. The cubic root of 1268857835 is about 1082.6073931575.

The spelling of 1268857835 in words is "one billion, two hundred sixty-eight million, eight hundred fifty-seven thousand, eight hundred thirty-five".