39393644 has 12 divisors (see below), whose sum is σ = 69195168. Its totient is φ = 19623600.

The previous prime is 39393643. The next prime is 39393691. The reversal of 39393644 is 44639393.

It is not an unprimeable number, because it can be changed into a prime (39393643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17087 + ... + 19254.

It is an arithmetic number, because the mean of its divisors is an integer number (5766264).

Almost surely, 2^39393644 is an apocalyptic number.

It is an amenable number.

39393644 is a deficient number, since it is larger than the sum of its proper divisors (29801524).

39393644 is a wasteful number, since it uses less digits than its factorization.

39393644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36616 (or 36614 counting only the distinct ones).

The product of its digits is 209952, while the sum is 41.

The square root of 39393644 is about 6276.4356126706. The cubic root of 39393644 is about 340.2582927719.

The spelling of 39393644 in words is "thirty-nine million, three hundred ninety-three thousand, six hundred forty-four".