1291796536 has 32 divisors (see below), whose sum is σ = 2514787200. Its totient is φ = 621429120.

The previous prime is 1291796533. The next prime is 1291796543. The reversal of 1291796536 is 6356971921.

It is a self number, because there is not a number n which added to its sum of digits gives 1291796536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291796531) 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, 27850 + ... + 57958.

It is an arithmetic number, because the mean of its divisors is an integer number (78587100).

Almost surely, 2^1291796536 is an apocalyptic number.

It is an amenable number.

1291796536 is a deficient number, since it is larger than the sum of its proper divisors (1222990664).

1291796536 is a wasteful number, since it uses less digits than its factorization.

1291796536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30319 (or 30315 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The square root of 1291796536 is about 35941.5711398375. The cubic root of 1291796536 is about 1089.0923443017.

The spelling of 1291796536 in words is "one billion, two hundred ninety-one million, seven hundred ninety-six thousand, five hundred thirty-six".