1291583488 has 76 divisors (see below), whose sum is σ = 2789206840. Its totient is φ = 594542592.

The previous prime is 1291583477. The next prime is 1291583509. The reversal of 1291583488 is 8843851921.

It is a happy number.

It is a super-2 number, since 2×1291583488² = 3336375812948492288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3407683 + ... + 3408061.

It is an arithmetic number, because the mean of its divisors is an integer number (36700090).

Almost surely, 2^1291583488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291583488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394603420).

1291583488 is an abundant number, since it is smaller than the sum of its proper divisors (1497623352).

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

1291583488 is an frugal number, since it uses more digits than its factorization.

1291583488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 394 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The square root of 1291583488 is about 35938.6072072917. The cubic root of 1291583488 is about 1089.0324685922.

The spelling of 1291583488 in words is "one billion, two hundred ninety-one million, five hundred eighty-three thousand, four hundred eighty-eight".