11809136 has 10 divisors (see below), whose sum is σ = 22880232. Its totient is φ = 5904560.

The previous prime is 11809111. The next prime is 11809141. The reversal of 11809136 is 63190811.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11809099 and 11809108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369020 + ... + 369051.

Almost surely, 2^11809136 is an apocalyptic number.

11809136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11809136 is a deficient number, since it is larger than the sum of its proper divisors (11071096).

11809136 is an equidigital number, since it uses as much as digits as its factorization.

11809136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738079 (or 738073 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 11809136 is about 3436.4423463809. The cubic root of 11809136 is about 227.7225516099.

Adding to 11809136 its reverse (63190811), we get a palindrome (74999947).

The spelling of 11809136 in words is "eleven million, eight hundred nine thousand, one hundred thirty-six".