39945205 has 8 divisors (see below), whose sum is σ = 49480704. Its totient is φ = 30925200.

The previous prime is 39945203. The next prime is 39945211. The reversal of 39945205 is 50254993.

39945205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39945205 - 2¹ = 39945203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39945203) 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 7 ways as a sum of consecutive naturals, for example, 128701 + ... + 129010.

It is an arithmetic number, because the mean of its divisors is an integer number (6185088).

Almost surely, 2^39945205 is an apocalyptic number.

It is an amenable number.

39945205 is a deficient number, since it is larger than the sum of its proper divisors (9535499).

39945205 is a wasteful number, since it uses less digits than its factorization.

39945205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257747.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 39945205 is about 6320.2219106610. The cubic root of 39945205 is about 341.8389544195.

The spelling of 39945205 in words is "thirty-nine million, nine hundred forty-five thousand, two hundred five".