39805965 has 16 divisors (see below), whose sum is σ = 70766400. Its totient is φ = 21229776.

The previous prime is 39805907. The next prime is 39806029. The reversal of 39805965 is 56950893.

39805965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39805965 - 2⁷ = 39805837 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 39805965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147295 + ... + 147564.

It is an arithmetic number, because the mean of its divisors is an integer number (4422900).

Almost surely, 2^39805965 is an apocalyptic number.

It is an amenable number.

39805965 is a deficient number, since it is larger than the sum of its proper divisors (30960435).

39805965 is a wasteful number, since it uses less digits than its factorization.

39805965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294873 (or 294867 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 39805965 is about 6309.1968585550. The cubic root of 39805965 is about 341.4413007815.

The spelling of 39805965 in words is "thirty-nine million, eight hundred five thousand, nine hundred sixty-five".