11985620 has 12 divisors (see below), whose sum is σ = 25169844. Its totient is φ = 4794240.

The previous prime is 11985601. The next prime is 11985647. The reversal of 11985620 is 2658911.

It can be written as a sum of positive squares in 2 ways, for example, as 1860496 + 10125124 = 1364^2 + 3182^2 .

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 3 ways as a sum of consecutive naturals, for example, 299621 + ... + 299660.

It is an arithmetic number, because the mean of its divisors is an integer number (2097487).

Almost surely, 2^11985620 is an apocalyptic number.

11985620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11985620 is an abundant number, since it is smaller than the sum of its proper divisors (13184224).

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

11985620 is a wasteful number, since it uses less digits than its factorization.

11985620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599290 (or 599288 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 11985620 is about 3462.0254187397. The cubic root of 11985620 is about 228.8513620082.

The spelling of 11985620 in words is "eleven million, nine hundred eighty-five thousand, six hundred twenty".