39749924 has 6 divisors (see below), whose sum is σ = 69562374. Its totient is φ = 19874960.

The previous prime is 39749909. The next prime is 39749971. The reversal of 39749924 is 42994793.

It can be written as a sum of positive squares in only one way, i.e., 38812900 + 937024 = 6230^2 + 968^2 .

It is a congruent number.

It is an unprimeable number.

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, 4968737 + ... + 4968744.

It is an arithmetic number, because the mean of its divisors is an integer number (11593729).

Almost surely, 2^39749924 is an apocalyptic number.

It is an amenable number.

39749924 is a deficient number, since it is larger than the sum of its proper divisors (29812450).

39749924 is a wasteful number, since it uses less digits than its factorization.

39749924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9937485 (or 9937483 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 39749924 is about 6304.7540792643. The cubic root of 39749924 is about 341.2809923235.

The spelling of 39749924 in words is "thirty-nine million, seven hundred forty-nine thousand, nine hundred twenty-four".