39680305 has 16 divisors (see below), whose sum is σ = 55448064. Its totient is φ = 26694720.

The previous prime is 39680299. The next prime is 39680321. The reversal of 39680305 is 50308693.

It is not a de Polignac number, because 39680305 - 2³ = 39680297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8841 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (3465504).

Almost surely, 2^39680305 is an apocalyptic number.

39680305 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39680305 is a deficient number, since it is larger than the sum of its proper divisors (15767759).

39680305 is a wasteful number, since it uses less digits than its factorization.

39680305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21456.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 39680305 is about 6299.2305085621. The cubic root of 39680305 is about 341.0816332339.

Adding to 39680305 its reverse (50308693), we get a palindrome (89988998).

The spelling of 39680305 in words is "thirty-nine million, six hundred eighty thousand, three hundred five".