11143940 has 12 divisors (see below), whose sum is σ = 23402316. Its totient is φ = 4457568.

The previous prime is 11143933. The next prime is 11143949. The reversal of 11143940 is 4934111.

It can be written as a sum of positive squares in 2 ways, for example, as 1359556 + 9784384 = 1166^2 + 3128^2 .

It is not an unprimeable number, because it can be changed into a prime (11143949) 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, 278579 + ... + 278618.

It is an arithmetic number, because the mean of its divisors is an integer number (1950193).

Almost surely, 2^11143940 is an apocalyptic number.

11143940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11143940 is an abundant number, since it is smaller than the sum of its proper divisors (12258376).

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

11143940 is a wasteful number, since it uses less digits than its factorization.

11143940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557206 (or 557204 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 11143940 is about 3338.2540346714. The cubic root of 11143940 is about 223.3638680064.

The spelling of 11143940 in words is "eleven million, one hundred forty-three thousand, nine hundred forty".