11997748 has 36 divisors (see below), whose sum is σ = 25036452. Its totient is φ = 5013120.

The previous prime is 11997691. The next prime is 11997751. The reversal of 11997748 is 84779911.

It can be written as a sum of positive squares in 2 ways, for example, as 5143824 + 6853924 = 2268^2 + 2618^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11997698 and 11997707.

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 11 ways as a sum of consecutive naturals, for example, 7290 + ... + 8782.

It is an arithmetic number, because the mean of its divisors is an integer number (695457).

Almost surely, 2^11997748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11997748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12518226).

11997748 is an abundant number, since it is smaller than the sum of its proper divisors (13038704).

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

11997748 is a wasteful number, since it uses less digits than its factorization.

11997748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552 (or 1543 counting only the distinct ones).

The product of its digits is 127008, while the sum is 46.

The square root of 11997748 is about 3463.7765516846. The cubic root of 11997748 is about 228.9285259676.

The spelling of 11997748 in words is "eleven million, nine hundred ninety-seven thousand, seven hundred forty-eight".