11997744 has 80 divisors (see below), whose sum is σ = 34950144. Its totient is φ = 3513600.

The previous prime is 11997691. The next prime is 11997751. The reversal of 11997744 is 44779911.

It is a super-2 number, since 2×11997744² = 287891722179072, which contains 22 as substring.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 11997696 and 11997705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16002 + ... + 16734.

Almost surely, 2^11997744 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 11997744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17475072).

11997744 is an abundant number, since it is smaller than the sum of its proper divisors (22952400).

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

11997744 is a wasteful number, since it uses less digits than its factorization.

11997744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 780 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 11997744 is about 3463.7759742801. The cubic root of 11997744 is about 228.9285005263.

It can be divided in two parts, 119977 and 44, that added together give a palindrome (120021).

The spelling of 11997744 in words is "eleven million, nine hundred ninety-seven thousand, seven hundred forty-four".