11720816 has 20 divisors (see below), whose sum is σ = 22785000. Its totient is φ = 5840832.

The previous prime is 11720809. The next prime is 11720851. The reversal of 11720816 is 61802711.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4535 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (1139250).

Almost surely, 2^11720816 is an apocalyptic number.

11720816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11720816 is a deficient number, since it is larger than the sum of its proper divisors (11064184).

11720816 is a wasteful number, since it uses less digits than its factorization.

11720816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456 (or 2450 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 11720816 is about 3423.5677297229. The cubic root of 11720816 is about 227.1534214837.

The spelling of 11720816 in words is "eleven million, seven hundred twenty thousand, eight hundred sixteen".