11783780 has 12 divisors (see below), whose sum is σ = 24745980. Its totient is φ = 4713504.

The previous prime is 11783767. The next prime is 11783791. The reversal of 11783780 is 8738711.

It can be written as a sum of positive squares in 2 ways, for example, as 9048064 + 2735716 = 3008^2 + 1654^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11783780.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294575 + ... + 294614.

It is an arithmetic number, because the mean of its divisors is an integer number (2062165).

Almost surely, 2^11783780 is an apocalyptic number.

11783780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11783780 is an abundant number, since it is smaller than the sum of its proper divisors (12962200).

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

11783780 is a wasteful number, since it uses less digits than its factorization.

11783780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589198 (or 589196 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 11783780 is about 3432.7510833150. The cubic root of 11783780 is about 227.5594499063.

The spelling of 11783780 in words is "eleven million, seven hundred eighty-three thousand, seven hundred eighty".