10991208 has 32 divisors (see below), whose sum is σ = 27568800. Its totient is φ = 3651648.

The previous prime is 10991207. The next prime is 10991213. The reversal of 10991208 is 80219901.

It is not an unprimeable number, because it can be changed into a prime (10991207) by changing a digit.

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, 9510 + ... + 10602.

It is an arithmetic number, because the mean of its divisors is an integer number (861525).

Almost surely, 2^10991208 is an apocalyptic number.

It is an amenable number.

10991208 is an abundant number, since it is smaller than the sum of its proper divisors (16577592).

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

10991208 is a wasteful number, since it uses less digits than its factorization.

10991208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 10991208 is about 3315.2990815310. The cubic root of 10991208 is about 222.3387410426.

The spelling of 10991208 in words is "ten million, nine hundred ninety-one thousand, two hundred eight".