1268278756 has 12 divisors (see below), whose sum is σ = 2219914620. Its totient is φ = 634017440.

The previous prime is 1268278717. The next prime is 1268278763. The reversal of 1268278756 is 6578728621.

It can be written as a sum of positive squares in 2 ways, for example, as 1074790656 + 193488100 = 32784^2 + 13910^2 .

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, 4651 + ... + 50578.

It is an arithmetic number, because the mean of its divisors is an integer number (184992885).

Almost surely, 2^1268278756 is an apocalyptic number.

It is an amenable number.

1268278756 is a deficient number, since it is larger than the sum of its proper divisors (951635864).

1268278756 is a wasteful number, since it uses less digits than its factorization.

1268278756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60974 (or 60972 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 52.

The square root of 1268278756 is about 35612.9015386278. The cubic root of 1268278756 is about 1082.4426753082.

The spelling of 1268278756 in words is "one billion, two hundred sixty-eight million, two hundred seventy-eight thousand, seven hundred fifty-six".