11818620 has 144 divisors (see below), whose sum is σ = 40255488. Its totient is φ = 2782080.

The previous prime is 11818607. The next prime is 11818643. The reversal of 11818620 is 2681811.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 92997 + ... + 93123.

It is an arithmetic number, because the mean of its divisors is an integer number (279552).

Almost surely, 2^11818620 is an apocalyptic number.

11818620 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 11818620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20127744).

11818620 is an abundant number, since it is smaller than the sum of its proper divisors (28436868).

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

11818620 is a wasteful number, since it uses less digits than its factorization.

11818620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 11818620 is about 3437.8219849201. The cubic root of 11818620 is about 227.7834971574.

It can be divided in two parts, 1181 and 8620, that added together give a square (9801 = 99²).

The spelling of 11818620 in words is "eleven million, eight hundred eighteen thousand, six hundred twenty".