1291836480 has 224 divisors, whose sum is σ = 4540105728. Its totient is φ = 308582400.

The previous prime is 1291836473. The next prime is 1291836517. The reversal of 1291836480 is 846381921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 748899 + ... + 750621.

Almost surely, 2^1291836480 is an apocalyptic number.

1291836480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291836480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2270052864).

1291836480 is an abundant number, since it is smaller than the sum of its proper divisors (3248269248).

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

1291836480 is a wasteful number, since it uses less digits than its factorization.

1291836480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1291836480 is about 35942.1268152011. The cubic root of 1291836480 is about 1089.1035695618.

The spelling of 1291836480 in words is "one billion, two hundred ninety-one million, eight hundred thirty-six thousand, four hundred eighty".