1286261768 has 16 divisors (see below), whose sum is σ = 2630990160. Its totient is φ = 584664400.

The previous prime is 1286261761. The next prime is 1286261789. The reversal of 1286261768 is 8671626821.

It is not an unprimeable number, because it can be changed into a prime (1286261761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7308218 + ... + 7308393.

It is an arithmetic number, because the mean of its divisors is an integer number (164436885).

Almost surely, 2^1286261768 is an apocalyptic number.

It is an amenable number.

1286261768 is an abundant number, since it is smaller than the sum of its proper divisors (1344728392).

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

1286261768 is a wasteful number, since it uses less digits than its factorization.

1286261768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14616628 (or 14616624 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 1286261768 is about 35864.4917432270. The cubic root of 1286261768 is about 1087.5346937098.

The spelling of 1286261768 in words is "one billion, two hundred eighty-six million, two hundred sixty-one thousand, seven hundred sixty-eight".