1296968840 has 16 divisors (see below), whose sum is σ = 2918179980. Its totient is φ = 518787520.

The previous prime is 1296968837. The next prime is 1296968851. The reversal of 1296968840 is 488696921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1267787236 + 29181604 = 35606^2 + 5402^2 .

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, 16212071 + ... + 16212150.

Almost surely, 2^1296968840 is an apocalyptic number.

1296968840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296968840 is an abundant number, since it is smaller than the sum of its proper divisors (1621211140).

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

1296968840 is a wasteful number, since it uses less digits than its factorization.

1296968840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32424232 (or 32424228 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 1296968840 is about 36013.4535972322. The cubic root of 1296968840 is about 1090.5439699899.

The spelling of 1296968840 in words is "one billion, two hundred ninety-six million, nine hundred sixty-eight thousand, eight hundred forty".