11709856 has 12 divisors (see below), whose sum is σ = 23053842. Its totient is φ = 5854912.

The previous prime is 11709853. The next prime is 11709883. The reversal of 11709856 is 65890711.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 13456 = 3420^2 + 116^2 .

It is not an unprimeable number, because it can be changed into a prime (11709853) 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 as a sum of consecutive naturals, namely, 182935 + ... + 182998.

Almost surely, 2^11709856 is an apocalyptic number.

11709856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11709856 is a deficient number, since it is larger than the sum of its proper divisors (11343986).

11709856 is an equidigital number, since it uses as much as digits as its factorization.

11709856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365943 (or 365935 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 11709856 is about 3421.9666859863. The cubic root of 11709856 is about 227.0825965542.

It can be divided in two parts, 1170 and 9856, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 11709856 in words is "eleven million, seven hundred nine thousand, eight hundred fifty-six".