39442805 has 8 divisors (see below), whose sum is σ = 50115672. Its totient is φ = 29698048.

The previous prime is 39442801. The next prime is 39442807. The reversal of 39442805 is 50824493.

It can be written as a sum of positive squares in 4 ways, for example, as 4502884 + 34939921 = 2122^2 + 5911^2 .

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

It is not a de Polignac number, because 39442805 - 2² = 39442801 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 (39442801) 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, 231932 + ... + 232101.

It is an arithmetic number, because the mean of its divisors is an integer number (6264459).

Almost surely, 2^39442805 is an apocalyptic number.

It is an amenable number.

39442805 is a deficient number, since it is larger than the sum of its proper divisors (10672867).

39442805 is a wasteful number, since it uses less digits than its factorization.

39442805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464055.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 39442805 is about 6280.3507067679. The cubic root of 39442805 is about 340.3997748552.

The spelling of 39442805 in words is "thirty-nine million, four hundred forty-two thousand, eight hundred five".