39655972 has 12 divisors (see below), whose sum is σ = 69655936. Its totient is φ = 19754280.

The previous prime is 39655969. The next prime is 39655981. The reversal of 39655972 is 27955693.

It is a happy number.

It is a super-2 number, since 2×39655972² = 3145192230529568, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 17208 + ... + 19375.

Almost surely, 2^39655972 is an apocalyptic number.

It is an amenable number.

39655972 is a deficient number, since it is larger than the sum of its proper divisors (29999964).

39655972 is a wasteful number, since it uses less digits than its factorization.

39655972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36858 (or 36856 counting only the distinct ones).

The product of its digits is 510300, while the sum is 46.

The square root of 39655972 is about 6297.2987859875. The cubic root of 39655972 is about 341.0118989206.

The spelling of 39655972 in words is "thirty-nine million, six hundred fifty-five thousand, nine hundred seventy-two".