11439220 has 24 divisors (see below), whose sum is σ = 25870824. Its totient is φ = 4223616.

The previous prime is 11439209. The next prime is 11439221. The reversal of 11439220 is 2293411.

11439220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1296 + 11437924 = 36^2 + 3382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11439191 and 11439200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11439221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21739 + ... + 22258.

It is an arithmetic number, because the mean of its divisors is an integer number (1077951).

Almost surely, 2^11439220 is an apocalyptic number.

11439220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11439220 is an abundant number, since it is smaller than the sum of its proper divisors (14431604).

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

11439220 is a wasteful number, since it uses less digits than its factorization.

11439220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44019 (or 44017 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 11439220 is about 3382.1915971748. The cubic root of 11439220 is about 225.3195131361.

The spelling of 11439220 in words is "eleven million, four hundred thirty-nine thousand, two hundred twenty".