39939272 has 8 divisors (see below), whose sum is σ = 74886150. Its totient is φ = 19969632.

The previous prime is 39939271. The next prime is 39939281. The reversal of 39939272 is 27293993.

It can be written as a sum of positive squares in only one way, i.e., 24462916 + 15476356 = 4946^2 + 3934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (39939271) 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 as a sum of consecutive naturals, namely, 2496197 + ... + 2496212.

Almost surely, 2^39939272 is an apocalyptic number.

It is an amenable number.

39939272 is a deficient number, since it is larger than the sum of its proper divisors (34946878).

39939272 is a wasteful number, since it uses less digits than its factorization.

39939272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4992415 (or 4992411 counting only the distinct ones).

The product of its digits is 183708, while the sum is 44.

The square root of 39939272 is about 6319.7525268004. The cubic root of 39939272 is about 341.8220293098.

The spelling of 39939272 in words is "thirty-nine million, nine hundred thirty-nine thousand, two hundred seventy-two".