39987328 has 16 divisors (see below), whose sum is σ = 79662510. Its totient is φ = 19993600.

The previous prime is 39987313. The next prime is 39987359. The reversal of 39987328 is 82378993.

It can be written as a sum of positive squares in only one way, i.e., 28643904 + 11343424 = 5352^2 + 3368^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156073 + ... + 156328.

Almost surely, 2^39987328 is an apocalyptic number.

It is an amenable number.

39987328 is a deficient number, since it is larger than the sum of its proper divisors (39675182).

39987328 is an equidigital number, since it uses as much as digits as its factorization.

39987328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312415 (or 312403 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 39987328 is about 6323.5534314181. The cubic root of 39987328 is about 341.9590708290.

The spelling of 39987328 in words is "thirty-nine million, nine hundred eighty-seven thousand, three hundred twenty-eight".