1091435568 has 40 divisors (see below), whose sum is σ = 2821843200. Its totient is φ = 363514944.

The previous prime is 1091435557. The next prime is 1091435573. The reversal of 1091435568 is 8655341901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54693 + ... + 71931.

It is an arithmetic number, because the mean of its divisors is an integer number (70546080).

Almost surely, 2^1091435568 is an apocalyptic number.

It is an amenable number.

1091435568 is an abundant number, since it is smaller than the sum of its proper divisors (1730407632).

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

1091435568 is a wasteful number, since it uses less digits than its factorization.

1091435568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18569 (or 18563 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 1091435568 is about 33036.8819351948. The cubic root of 1091435568 is about 1029.5940738709.

The spelling of 1091435568 in words is "one billion, ninety-one million, four hundred thirty-five thousand, five hundred sixty-eight".