1164991008 has 96 divisors (see below), whose sum is σ = 3101184576. Its totient is φ = 382906368.

The previous prime is 1164991001. The next prime is 1164991027. The reversal of 1164991008 is 8001994611.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1164991001) 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 15 ways as a sum of consecutive naturals, for example, 3721860 + ... + 3722172.

It is an arithmetic number, because the mean of its divisors is an integer number (32304006).

Almost surely, 2^1164991008 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 1164991008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550592288).

1164991008 is an abundant number, since it is smaller than the sum of its proper divisors (1936193568).

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

1164991008 is a wasteful number, since it uses less digits than its factorization.

1164991008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 1164991008 is about 34131.9646079742. The cubic root of 1164991008 is about 1052.2223551346. Note that the first 3 decimals are identical.

The spelling of 1164991008 in words is "one billion, one hundred sixty-four million, nine hundred ninety-one thousand, eight".