3639705 has 8 divisors (see below), whose sum is σ = 5823552. Its totient is φ = 1941168.

The previous prime is 3639689. The next prime is 3639719. The reversal of 3639705 is 5079363.

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

It is not a de Polignac number, because 3639705 - 2⁴ = 3639689 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121309 + ... + 121338.

It is an arithmetic number, because the mean of its divisors is an integer number (727944).

Almost surely, 2^3639705 is an apocalyptic number.

It is an amenable number.

3639705 is a deficient number, since it is larger than the sum of its proper divisors (2183847).

3639705 is a wasteful number, since it uses less digits than its factorization.

3639705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242655.

The product of its (nonzero) digits is 17010, while the sum is 33.

The square root of 3639705 is about 1907.8010902607. The cubic root of 3639705 is about 153.8232779128.

The spelling of 3639705 in words is "three million, six hundred thirty-nine thousand, seven hundred five".