11731816 has 32 divisors (see below), whose sum is σ = 23472000. Its totient is φ = 5481216.

The previous prime is 11731789. The next prime is 11731829. The reversal of 11731816 is 61813711.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11520 + ... + 12496.

It is an arithmetic number, because the mean of its divisors is an integer number (733500).

Almost surely, 2^11731816 is an apocalyptic number.

It is an amenable number.

11731816 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

11731816 is a wasteful number, since it uses less digits than its factorization.

11731816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1077 counting only the distinct ones).

The product of its digits is 1008, while the sum is 28.

The square root of 11731816 is about 3425.1738642002. The cubic root of 11731816 is about 227.2244605186.

The spelling of 11731816 in words is "eleven million, seven hundred thirty-one thousand, eight hundred sixteen".