1268311808 has 36 divisors (see below), whose sum is σ = 2534171640. Its totient is φ = 633529344.

The previous prime is 1268311801. The next prime is 1268311819. The reversal of 1268311808 is 8081138621.

It is a super-2 number, since 2×1268311808² = 3217229684624457728, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268311801) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 364091 + ... + 367557.

Almost surely, 2^1268311808 is an apocalyptic number.

It is an amenable number.

1268311808 is a deficient number, since it is larger than the sum of its proper divisors (1265859832).

1268311808 is an equidigital number, since it uses as much as digits as its factorization.

1268311808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912 (or 4898 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1268311808 is about 35613.3655809164. The cubic root of 1268311808 is about 1082.4520782317.

The spelling of 1268311808 in words is "one billion, two hundred sixty-eight million, three hundred eleven thousand, eight hundred eight".