11989744 has 40 divisors (see below), whose sum is σ = 25467120. Its totient is φ = 5434368.

The previous prime is 11989727. The next prime is 11989763. The reversal of 11989744 is 44798911.

It is a super-2 number, since 2×11989744² = 287507922371072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 11989744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11784 + ... + 12760.

It is an arithmetic number, because the mean of its divisors is an integer number (636678).

Almost surely, 2^11989744 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 11989744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12733560).

11989744 is an abundant number, since it is smaller than the sum of its proper divisors (13477376).

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

11989744 is a wasteful number, since it uses less digits than its factorization.

11989744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1051 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 11989744 is about 3462.6209726160. The cubic root of 11989744 is about 228.8776066467.

The spelling of 11989744 in words is "eleven million, nine hundred eighty-nine thousand, seven hundred forty-four".