1269912768 has 56 divisors (see below), whose sum is σ = 3468380160. Its totient is φ = 409647360.

The previous prime is 1269912739. The next prime is 1269912793. The reversal of 1269912768 is 8672199621.

It is a super-2 number, since 2×1269912768² = 3225356876658843648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1269912768.

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 7 ways as a sum of consecutive naturals, for example, 100728 + ... + 112631.

It is an arithmetic number, because the mean of its divisors is an integer number (61935360).

Almost surely, 2^1269912768 is an apocalyptic number.

It is an amenable number.

1269912768 is an abundant number, since it is smaller than the sum of its proper divisors (2198467392).

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

1269912768 is a wasteful number, since it uses less digits than its factorization.

1269912768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213405 (or 213395 counting only the distinct ones).

The product of its digits is 653184, while the sum is 51.

The square root of 1269912768 is about 35635.8354469206. The cubic root of 1269912768 is about 1082.9073379504.

The spelling of 1269912768 in words is "one billion, two hundred sixty-nine million, nine hundred twelve thousand, seven hundred sixty-eight".