11143780 has 24 divisors (see below), whose sum is σ = 23845752. Its totient is φ = 4372992.

The previous prime is 11143733. The next prime is 11143817. The reversal of 11143780 is 8734111.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 11115556 = 168^2 + 3334^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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, 4197 + ... + 6316.

It is an arithmetic number, because the mean of its divisors is an integer number (993573).

Almost surely, 2^11143780 is an apocalyptic number.

11143780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11143780 is an abundant number, since it is smaller than the sum of its proper divisors (12701972).

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

11143780 is a wasteful number, since it uses less digits than its factorization.

11143780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10575 (or 10573 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 11143780 is about 3338.2300699622. The cubic root of 11143780 is about 223.3627990132.

Adding to 11143780 its reverse (8734111), we get a palindrome (19877891).

The spelling of 11143780 in words is "eleven million, one hundred forty-three thousand, seven hundred eighty".