11838780 has 72 divisors (see below), whose sum is σ = 36363600. Its totient is φ = 3117312.

The previous prime is 11838773. The next prime is 11838781. The reversal of 11838780 is 8783811.

11838780 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11838781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15651 + ... + 16389.

It is an arithmetic number, because the mean of its divisors is an integer number (505050).

Almost surely, 2^11838780 is an apocalyptic number.

11838780 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 11838780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18181800).

11838780 is an abundant number, since it is smaller than the sum of its proper divisors (24524820).

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

11838780 is a wasteful number, since it uses less digits than its factorization.

11838780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 11838780 is about 3440.7528246010. The cubic root of 11838780 is about 227.9129399836.

The spelling of 11838780 in words is "eleven million, eight hundred thirty-eight thousand, seven hundred eighty".