39444220 has 48 divisors (see below), whose sum is σ = 85877568. Its totient is φ = 15206400.

The previous prime is 39444217. The next prime is 39444239. The reversal of 39444220 is 2244493.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111564 + ... + 111916.

It is an arithmetic number, because the mean of its divisors is an integer number (1789116).

Almost surely, 2^39444220 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 39444220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42938784).

39444220 is an abundant number, since it is smaller than the sum of its proper divisors (46433348).

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

39444220 is a wasteful number, since it uses less digits than its factorization.

39444220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 39444220 is about 6280.4633587021. The cubic root of 39444220 is about 340.4038453899.

The spelling of 39444220 in words is "thirty-nine million, four hundred forty-four thousand, two hundred twenty".