11543920 has 20 divisors (see below), whose sum is σ = 26839800. Its totient is φ = 4617536.

The previous prime is 11543911. The next prime is 11543921. The reversal of 11543920 is 2934511.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72070 + ... + 72229.

It is an arithmetic number, because the mean of its divisors is an integer number (1341990).

Almost surely, 2^11543920 is an apocalyptic number.

11543920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11543920 is an abundant number, since it is smaller than the sum of its proper divisors (15295880).

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

11543920 is a wasteful number, since it uses less digits than its factorization.

11543920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144312 (or 144306 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 11543920 is about 3397.6344712167. The cubic root of 11543920 is about 226.0048554051.

The spelling of 11543920 in words is "eleven million, five hundred forty-three thousand, nine hundred twenty".