11881644 has 12 divisors (see below), whose sum is σ = 27723864. Its totient is φ = 3960544.

The previous prime is 11881591. The next prime is 11881673. The reversal of 11881644 is 44618811.

11881644 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 (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495057 + ... + 495080.

It is an arithmetic number, because the mean of its divisors is an integer number (2310322).

Almost surely, 2^11881644 is an apocalyptic number.

It is an amenable number.

11881644 is an abundant number, since it is smaller than the sum of its proper divisors (15842220).

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

11881644 is a wasteful number, since it uses less digits than its factorization.

11881644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990144 (or 990142 counting only the distinct ones).

The product of its digits is 6144, while the sum is 33.

The square root of 11881644 is about 3446.9760660614. The cubic root of 11881644 is about 228.1876725034.

The spelling of 11881644 in words is "eleven million, eight hundred eighty-one thousand, six hundred forty-four".