39997732 has 6 divisors (see below), whose sum is σ = 69996038. Its totient is φ = 19998864.

The previous prime is 39997687. The next prime is 39997733. The reversal of 39997732 is 23779993.

It can be written as a sum of positive squares in only one way, i.e., 20848356 + 19149376 = 4566^2 + 4376^2 .

It is not an unprimeable number, because it can be changed into a prime (39997733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999713 + ... + 4999720.

Almost surely, 2^39997732 is an apocalyptic number.

It is an amenable number.

39997732 is a deficient number, since it is larger than the sum of its proper divisors (29998306).

39997732 is a wasteful number, since it uses less digits than its factorization.

39997732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999437 (or 9999435 counting only the distinct ones).

The product of its digits is 642978, while the sum is 49.

The square root of 39997732 is about 6324.3760166518. The cubic root of 39997732 is about 341.9887255041.

The spelling of 39997732 in words is "thirty-nine million, nine hundred ninety-seven thousand, seven hundred thirty-two".