39945544 has 16 divisors (see below), whose sum is σ = 75237120. Its totient is φ = 19882320.

The previous prime is 39945539. The next prime is 39945547. The reversal of 39945544 is 44554993.

It is a self number, because there is not a number n which added to its sum of digits gives 39945544.

It is not an unprimeable number, because it can be changed into a prime (39945547) 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, 9412 + ... + 12979.

It is an arithmetic number, because the mean of its divisors is an integer number (4702320).

Almost surely, 2^39945544 is an apocalyptic number.

It is an amenable number.

39945544 is a deficient number, since it is larger than the sum of its proper divisors (35291576).

39945544 is a wasteful number, since it uses less digits than its factorization.

39945544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22620 (or 22616 counting only the distinct ones).

The product of its digits is 388800, while the sum is 43.

The square root of 39945544 is about 6320.2487292827. The cubic root of 39945544 is about 341.8399214365.

The spelling of 39945544 in words is "thirty-nine million, nine hundred forty-five thousand, five hundred forty-four".