11991748 has 12 divisors (see below), whose sum is σ = 21067200. Its totient is φ = 5972552.

The previous prime is 11991743. The next prime is 11991773. The reversal of 11991748 is 84719911.

It is a self number, because there is not a number n which added to its sum of digits gives 11991748.

It is not an unprimeable number, because it can be changed into a prime (11991743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4648 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (1755600).

Almost surely, 2^11991748 is an apocalyptic number.

It is an amenable number.

11991748 is a deficient number, since it is larger than the sum of its proper divisors (9075452).

11991748 is a wasteful number, since it uses less digits than its factorization.

11991748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11666 (or 11664 counting only the distinct ones).

The product of its digits is 18144, while the sum is 40.

The square root of 11991748 is about 3462.9103366966. The cubic root of 11991748 is about 228.8903576883.

The spelling of 11991748 in words is "eleven million, nine hundred ninety-one thousand, seven hundred forty-eight".