11955816 has 32 divisors (see below), whose sum is σ = 33211200. Its totient is φ = 3985200.

The previous prime is 11955809. The next prime is 11955821. The reversal of 11955816 is 61855911.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27460 + ... + 27891.

It is an arithmetic number, because the mean of its divisors is an integer number (1037850).

Almost surely, 2^11955816 is an apocalyptic number.

It is an amenable number.

11955816 is an abundant number, since it is smaller than the sum of its proper divisors (21255384).

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

11955816 is a wasteful number, since it uses less digits than its factorization.

11955816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55366 (or 55356 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 11955816 is about 3457.7183228250. The cubic root of 11955816 is about 228.6615137467.

The spelling of 11955816 in words is "eleven million, nine hundred fifty-five thousand, eight hundred sixteen".