1089640968 has 32 divisors (see below), whose sum is σ = 2933649600. Its totient is φ = 335274048.

The previous prime is 1089640963. The next prime is 1089641053. The reversal of 1089640968 is 8690469801.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1089640968.

It is not an unprimeable number, because it can be changed into a prime (1089640961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1745908 + ... + 1746531.

It is an arithmetic number, because the mean of its divisors is an integer number (91676550).

Almost surely, 2^1089640968 is an apocalyptic number.

It is an amenable number.

1089640968 is an abundant number, since it is smaller than the sum of its proper divisors (1844008632).

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

1089640968 is a wasteful number, since it uses less digits than its factorization.

1089640968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492461 (or 3492457 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 1089640968 is about 33009.7102077555. The cubic root of 1089640968 is about 1029.0294587261.

The spelling of 1089640968 in words is "one billion, eighty-nine million, six hundred forty thousand, nine hundred sixty-eight".