1280668292 has 12 divisors (see below), whose sum is σ = 2295832476. Its totient is φ = 624716160.

The previous prime is 1280668247. The next prime is 1280668303. The reversal of 1280668292 is 2928660821.

It can be written as a sum of positive squares in 2 ways, for example, as 728136256 + 552532036 = 26984^2 + 23506^2 .

It is a super-2 number, since 2×1280668292² = 3280222548268394528, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 3904313 + ... + 3904640.

It is an arithmetic number, because the mean of its divisors is an integer number (191319373).

Almost surely, 2^1280668292 is an apocalyptic number.

It is an amenable number.

1280668292 is a deficient number, since it is larger than the sum of its proper divisors (1015164184).

1280668292 is a wasteful number, since it uses less digits than its factorization.

1280668292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808998 (or 7808996 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1280668292 is about 35786.4260858779. The cubic root of 1280668292 is about 1085.9559745512.

The spelling of 1280668292 in words is "one billion, two hundred eighty million, six hundred sixty-eight thousand, two hundred ninety-two".