39678965 has 8 divisors (see below), whose sum is σ = 47751768. Its totient is φ = 31651840.

The previous prime is 39678953. The next prime is 39678997. The reversal of 39678965 is 56987693.

It can be written as a sum of positive squares in 4 ways, for example, as 14161 + 39664804 = 119^2 + 6298^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39678965 - 2¹⁰ = 39677941 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 9476 + ... + 13005.

It is an arithmetic number, because the mean of its divisors is an integer number (5968971).

Almost surely, 2^39678965 is an apocalyptic number.

It is an amenable number.

39678965 is a deficient number, since it is larger than the sum of its proper divisors (8072803).

39678965 is a wasteful number, since it uses less digits than its factorization.

39678965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22839.

The product of its digits is 2449440, while the sum is 53.

The square root of 39678965 is about 6299.1241454666. The cubic root of 39678965 is about 341.0777937596.

The spelling of 39678965 in words is "thirty-nine million, six hundred seventy-eight thousand, nine hundred sixty-five".