1268691872 has 24 divisors (see below), whose sum is σ = 2854557216. Its totient is φ = 543724992.

The previous prime is 1268691863. The next prime is 1268691881. The reversal of 1268691872 is 2781968621.

It is an interprime number because it is at equal distance from previous prime (1268691863) and next prime (1268691881).

It is a self number, because there is not a number n which added to its sum of digits gives 1268691872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2831678 + ... + 2832125.

It is an arithmetic number, because the mean of its divisors is an integer number (118939884).

Almost surely, 2^1268691872 is an apocalyptic number.

It is an amenable number.

1268691872 is an abundant number, since it is smaller than the sum of its proper divisors (1585865344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268691872 is an equidigital number, since it uses as much as digits as its factorization.

1268691872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663820 (or 5663812 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 1268691872 is about 35618.7011554324. The cubic root of 1268691872 is about 1082.5601904423.

The spelling of 1268691872 in words is "one billion, two hundred sixty-eight million, six hundred ninety-one thousand, eight hundred seventy-two".