39965885 has 4 divisors (see below), whose sum is σ = 47959068. Its totient is φ = 31972704.

The previous prime is 39965803. The next prime is 39965897. The reversal of 39965885 is 58856993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26759929 + 13205956 = 5173^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 39965885 - 2²⁰ = 38917309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3996584 + ... + 3996593.

It is an arithmetic number, because the mean of its divisors is an integer number (11989767).

Almost surely, 2^39965885 is an apocalyptic number.

It is an amenable number.

39965885 is a deficient number, since it is larger than the sum of its proper divisors (7993183).

39965885 is an equidigital number, since it uses as much as digits as its factorization.

39965885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7993182.

The product of its digits is 2332800, while the sum is 53.

The square root of 39965885 is about 6321.8577174751. The cubic root of 39965885 is about 341.8979352992.

The spelling of 39965885 in words is "thirty-nine million, nine hundred sixty-five thousand, eight hundred eighty-five".