11911424 has 108 divisors (see below), whose sum is σ = 30120384. Its totient is φ = 4595712.

The previous prime is 11911421. The next prime is 11911439. The reversal of 11911424 is 42411911.

11911424 = 188² + 189² + ... + 348².

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 11911424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11911421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 517877 + ... + 517899.

Almost surely, 2^11911424 is an apocalyptic number.

11911424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11911424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15060192).

11911424 is an abundant number, since it is smaller than the sum of its proper divisors (18208960).

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

11911424 is an equidigital number, since it uses as much as digits as its factorization.

11911424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 49 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 11911424 is about 3451.2930910023. The cubic root of 11911424 is about 228.3781556681.

The spelling of 11911424 in words is "eleven million, nine hundred eleven thousand, four hundred twenty-four".