39930724 has 6 divisors (see below), whose sum is σ = 69878774. Its totient is φ = 19965360.

The previous prime is 39930721. The next prime is 39930749. The reversal of 39930724 is 42703993.

It can be written as a sum of positive squares in only one way, i.e., 29484900 + 10445824 = 5430^2 + 3232^2 .

It is not an unprimeable number, because it can be changed into a prime (39930721) 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, 4991337 + ... + 4991344.

Almost surely, 2^39930724 is an apocalyptic number.

It is an amenable number.

39930724 is a deficient number, since it is larger than the sum of its proper divisors (29948050).

39930724 is a wasteful number, since it uses less digits than its factorization.

39930724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9982685 (or 9982683 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 39930724 is about 6319.0761983062. The cubic root of 39930724 is about 341.7976414242.

The spelling of 39930724 in words is "thirty-nine million, nine hundred thirty thousand, seven hundred twenty-four".