11191608 has 112 divisors (see below), whose sum is σ = 33445800. Its totient is φ = 3499200.

The previous prime is 11191603. The next prime is 11191657. The reversal of 11191608 is 80619111.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11191603) 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 27 ways as a sum of consecutive naturals, for example, 110758 + ... + 110858.

Almost surely, 2^11191608 is an apocalyptic number.

11191608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11191608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16722900).

11191608 is an abundant number, since it is smaller than the sum of its proper divisors (22254192).

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

11191608 is a wasteful number, since it uses less digits than its factorization.

11191608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 11191608 is about 3345.3860763744. The cubic root of 11191608 is about 223.6818932773.

It can be divided in two parts, 111 and 91608, that added together give a palindrome (91719).

The spelling of 11191608 in words is "eleven million, one hundred ninety-one thousand, six hundred eight".