39943449 has 40 divisors (see below), whose sum is σ = 73451840. Its totient is φ = 21065184.

The previous prime is 39943447. The next prime is 39943459. The reversal of 39943449 is 94434993.

39943449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39943449 - 2¹ = 39943447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39943447) 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 39 ways as a sum of consecutive naturals, for example, 4662 + ... + 10080.

It is an arithmetic number, because the mean of its divisors is an integer number (1836296).

Almost surely, 2^39943449 is an apocalyptic number.

39943449 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

39943449 is a deficient number, since it is larger than the sum of its proper divisors (33508391).

39943449 is a wasteful number, since it uses less digits than its factorization.

39943449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451 (or 5442 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 39943449 is about 6320.0829899614. The cubic root of 39943449 is about 341.8339452409.

The spelling of 39943449 in words is "thirty-nine million, nine hundred forty-three thousand, four hundred forty-nine".