39921244 has 12 divisors (see below), whose sum is σ = 76213368. Its totient is φ = 18146000.

The previous prime is 39921227. The next prime is 39921247. The reversal of 39921244 is 44212993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39921247) 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 3 ways as a sum of consecutive naturals, for example, 453607 + ... + 453694.

It is an arithmetic number, because the mean of its divisors is an integer number (6351114).

Almost surely, 2^39921244 is an apocalyptic number.

It is an amenable number.

39921244 is a deficient number, since it is larger than the sum of its proper divisors (36292124).

39921244 is a wasteful number, since it uses less digits than its factorization.

39921244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907316 (or 907314 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 39921244 is about 6318.3260441354. The cubic root of 39921244 is about 341.7705904238.

The spelling of 39921244 in words is "thirty-nine million, nine hundred twenty-one thousand, two hundred forty-four".