1268805885 has 32 divisors (see below), whose sum is σ = 2082592512. Its totient is φ = 659243520.

The previous prime is 1268805841. The next prime is 1268805911. The reversal of 1268805885 is 5885088621.

It is not a de Polignac number, because 1268805885 - 2⁶ = 1268805821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 686032 + ... + 687878.

It is an arithmetic number, because the mean of its divisors is an integer number (65081016).

Almost surely, 2^1268805885 is an apocalyptic number.

1268805885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1268805885 is a deficient number, since it is larger than the sum of its proper divisors (813786627).

1268805885 is a wasteful number, since it uses less digits than its factorization.

1268805885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 1228800, while the sum is 51.

The square root of 1268805885 is about 35620.3015849108. The cubic root of 1268805885 is about 1082.5926181317.

The spelling of 1268805885 in words is "one billion, two hundred sixty-eight million, eight hundred five thousand, eight hundred eighty-five".