11123780 has 24 divisors (see below), whose sum is σ = 24734808. Its totient is φ = 4187648.

The previous prime is 11123773. The next prime is 11123851. The reversal of 11123780 is 8732111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4813636 + 6310144 = 2194^2 + 2512^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16019 + ... + 16698.

It is an arithmetic number, because the mean of its divisors is an integer number (1030617).

Almost surely, 2^11123780 is an apocalyptic number.

11123780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11123780 is an abundant number, since it is smaller than the sum of its proper divisors (13611028).

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

11123780 is a wasteful number, since it uses less digits than its factorization.

11123780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32743 (or 32741 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 11123780 is about 3335.2331252852. The cubic root of 11123780 is about 223.2290941977.

Adding to 11123780 its reverse (8732111), we get a palindrome (19855891).

The spelling of 11123780 in words is "eleven million, one hundred twenty-three thousand, seven hundred eighty".