39944535 has 16 divisors (see below), whose sum is σ = 64631520. Its totient is φ = 21063680.

The previous prime is 39944521. The next prime is 39944539. The reversal of 39944535 is 53544993.

It is a happy number.

It is not a de Polignac number, because 39944535 - 2⁴ = 39944519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39944539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13626 + ... + 16295.

It is an arithmetic number, because the mean of its divisors is an integer number (4039470).

Almost surely, 2^39944535 is an apocalyptic number.

39944535 is a deficient number, since it is larger than the sum of its proper divisors (24686985).

39944535 is a wasteful number, since it uses less digits than its factorization.

39944535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30018.

The product of its digits is 291600, while the sum is 42.

The square root of 39944535 is about 6320.1689059708. The cubic root of 39944535 is about 341.8370431899.

The spelling of 39944535 in words is "thirty-nine million, nine hundred forty-four thousand, five hundred thirty-five".