11891424 has 48 divisors (see below), whose sum is σ = 31561488. Its totient is φ = 3919872.

The previous prime is 11891413. The next prime is 11891431. The reversal of 11891424 is 42419811.

11891424 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 11891391 and 11891400.

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, 8674 + ... + 9950.

It is an arithmetic number, because the mean of its divisors is an integer number (657531).

Almost surely, 2^11891424 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 11891424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15780744).

11891424 is an abundant number, since it is smaller than the sum of its proper divisors (19670064).

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

11891424 is a wasteful number, since it uses less digits than its factorization.

11891424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1379 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 11891424 is about 3448.3944089967. The cubic root of 11891424 is about 228.2502638251.

The spelling of 11891424 in words is "eleven million, eight hundred ninety-one thousand, four hundred twenty-four".