39680865 has 48 divisors (see below), whose sum is σ = 82038528. Its totient is φ = 17347968.

The previous prime is 39680833. The next prime is 39680881. The reversal of 39680865 is 56808693.

It is not a de Polignac number, because 39680865 - 2⁵ = 39680833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 39680865.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4507 + ... + 9983.

It is an arithmetic number, because the mean of its divisors is an integer number (1709136).

Almost surely, 2^39680865 is an apocalyptic number.

39680865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39680865 is an abundant number, since it is smaller than the sum of its proper divisors (42357663).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39680865 is a wasteful number, since it uses less digits than its factorization.

39680865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518 (or 5515 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 39680865 is about 6299.2749582789. The cubic root of 39680865 is about 341.0832377647.

The spelling of 39680865 in words is "thirty-nine million, six hundred eighty thousand, eight hundred sixty-five".