38665972 has 12 divisors (see below), whose sum is σ = 67783716. Its totient is φ = 19299200.

The previous prime is 38665951. The next prime is 38665981. The reversal of 38665972 is 27956683.

It can be written as a sum of positive squares in 2 ways, for example, as 28451556 + 10214416 = 5334^2 + 3196^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5779 + ... + 10522.

It is an arithmetic number, because the mean of its divisors is an integer number (5648643).

Almost surely, 2^38665972 is an apocalyptic number.

It is an amenable number.

38665972 is a deficient number, since it is larger than the sum of its proper divisors (29117744).

38665972 is a wasteful number, since it uses less digits than its factorization.

38665972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16898 (or 16896 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 38665972 is about 6218.1968447453. The cubic root of 38665972 is about 338.1501964270.

The spelling of 38665972 in words is "thirty-eight million, six hundred sixty-five thousand, nine hundred seventy-two".