11143920 has 80 divisors (see below), whose sum is σ = 35176320. Its totient is φ = 2917632.

The previous prime is 11143903. The next prime is 11143921. The reversal of 11143920 is 2934111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13767 + ... + 14553.

It is an arithmetic number, because the mean of its divisors is an integer number (439704).

Almost surely, 2^11143920 is an apocalyptic number.

11143920 is a gapful number since it is divisible by the number (10) 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 11143920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17588160).

11143920 is an abundant number, since it is smaller than the sum of its proper divisors (24032400).

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

11143920 is a wasteful number, since it uses less digits than its factorization.

11143920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 11143920 is about 3338.2510390922. The cubic root of 11143920 is about 223.3637343828.

The spelling of 11143920 in words is "eleven million, one hundred forty-three thousand, nine hundred twenty".