1268312256 has 84 divisors (see below), whose sum is σ = 3770078312. Its totient is φ = 422765568.

The previous prime is 1268312239. The next prime is 1268312261. The reversal of 1268312256 is 6522138621.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1268312256.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25225 + ... + 56328.

Almost surely, 2^1268312256 is an apocalyptic number.

1268312256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1268312256 is an abundant number, since it is smaller than the sum of its proper divisors (2501766056).

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

1268312256 is an frugal number, since it uses more digits than its factorization.

1268312256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81580 (or 81558 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1268312256 is about 35613.3718706892. The cubic root of 1268312256 is about 1082.4522056816.

The spelling of 1268312256 in words is "one billion, two hundred sixty-eight million, three hundred twelve thousand, two hundred fifty-six".