1286767968 has 48 divisors (see below), whose sum is σ = 3380448960. Its totient is φ = 428582016.

The previous prime is 1286767943. The next prime is 1286767969. The reversal of 1286767968 is 8697676821.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286767969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135471 + ... + 144657.

It is an arithmetic number, because the mean of its divisors is an integer number (70426020).

Almost surely, 2^1286767968 is an apocalyptic number.

It is an amenable number.

1286767968 is an abundant number, since it is smaller than the sum of its proper divisors (2093680992).

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

1286767968 is a wasteful number, since it uses less digits than its factorization.

1286767968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10659 (or 10651 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The square root of 1286767968 is about 35871.5481684301. The cubic root of 1286767968 is about 1087.6773390807.

The spelling of 1286767968 in words is "one billion, two hundred eighty-six million, seven hundred sixty-seven thousand, nine hundred sixty-eight".