11991416 has 8 divisors (see below), whose sum is σ = 22483920. Its totient is φ = 5995704.

The previous prime is 11991407. The next prime is 11991433. The reversal of 11991416 is 61419911.

It is a tau number, because it is divible by the number of its divisors (8).

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, 749456 + ... + 749471.

It is an arithmetic number, because the mean of its divisors is an integer number (2810490).

Almost surely, 2^11991416 is an apocalyptic number.

It is an amenable number.

11991416 is a deficient number, since it is larger than the sum of its proper divisors (10492504).

11991416 is a wasteful number, since it uses less digits than its factorization.

11991416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498933 (or 1498929 counting only the distinct ones).

The product of its digits is 1944, while the sum is 32.

The square root of 11991416 is about 3462.8623998074. The cubic root of 11991416 is about 228.8882453385. Note that the first 3 decimals are identical.

The spelling of 11991416 in words is "eleven million, nine hundred ninety-one thousand, four hundred sixteen".