1091344688 has 20 divisors (see below), whose sum is σ = 2416549200. Its totient is φ = 467719104.

The previous prime is 1091344669. The next prime is 1091344691. The reversal of 1091344688 is 8864431901.

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, 4871963 + ... + 4872186.

It is an arithmetic number, because the mean of its divisors is an integer number (120827460).

Almost surely, 2^1091344688 is an apocalyptic number.

It is an amenable number.

1091344688 is an abundant number, since it is smaller than the sum of its proper divisors (1325204512).

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

1091344688 is an equidigital number, since it uses as much as digits as its factorization.

1091344688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744164 (or 9744158 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1091344688 is about 33035.5064740954. The cubic root of 1091344688 is about 1029.5654961856.

The spelling of 1091344688 in words is "one billion, ninety-one million, three hundred forty-four thousand, six hundred eighty-eight".