1291044348 has 108 divisors (see below), whose sum is σ = 3602433744. Its totient is φ = 389558400.

The previous prime is 1291044329. The next prime is 1291044401. The reversal of 1291044348 is 8434401921.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1354240 + ... + 1355192.

It is an arithmetic number, because the mean of its divisors is an integer number (33355868).

Almost surely, 2^1291044348 is an apocalyptic number.

1291044348 is a gapful number since it is divisible by the number (18) 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 1291044348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801216872).

1291044348 is an abundant number, since it is smaller than the sum of its proper divisors (2311389396).

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

1291044348 is a wasteful number, since it uses less digits than its factorization.

1291044348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1291044348 is about 35931.1055772015. The cubic root of 1291044348 is about 1088.8809174961.

The spelling of 1291044348 in words is "one billion, two hundred ninety-one million, forty-four thousand, three hundred forty-eight".