39216393 has 10 divisors (see below), whose sum is σ = 58582634. Its totient is φ = 26144208.

The previous prime is 39216389. The next prime is 39216407. The reversal of 39216393 is 39361293.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 34433424 + 4782969 = 5868^2 + 2187^2 .

It is not a de Polignac number, because 39216393 - 2² = 39216389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39216313) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 241996 + ... + 242157.

Almost surely, 2^39216393 is an apocalyptic number.

It is an amenable number.

39216393 is a deficient number, since it is larger than the sum of its proper divisors (19366241).

39216393 is an equidigital number, since it uses as much as digits as its factorization.

39216393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484165 (or 484156 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 39216393 is about 6262.2993381026. The cubic root of 39216393 is about 339.7471967372.

The spelling of 39216393 in words is "thirty-nine million, two hundred sixteen thousand, three hundred ninety-three".