39009220 has 48 divisors (see below), whose sum is σ = 87257520. Its totient is φ = 14648832.

The previous prime is 39009181. The next prime is 39009221. The reversal of 39009220 is 2290093.

39009220 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 8 ways, for example, as 171396 + 38837824 = 414^2 + 6232^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39009221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 98062 + ... + 98458.

It is an arithmetic number, because the mean of its divisors is an integer number (1817865).

Almost surely, 2^39009220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39009220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43628760).

39009220 is an abundant number, since it is smaller than the sum of its proper divisors (48248300).

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

39009220 is a wasteful number, since it uses less digits than its factorization.

39009220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 39009220 is about 6245.7361455636. The cubic root of 39009220 is about 339.1478661013.

The spelling of 39009220 in words is "thirty-nine million, nine thousand, two hundred twenty".