3906635 has 4 divisors (see below), whose sum is σ = 4687968. Its totient is φ = 3125304.

The previous prime is 3906613. The next prime is 3906641. The reversal of 3906635 is 5366093.

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

It is a cyclic number.

It is not a de Polignac number, because 3906635 - 2²⁰ = 2858059 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 390659 + ... + 390668.

It is an arithmetic number, because the mean of its divisors is an integer number (1171992).

Almost surely, 2^3906635 is an apocalyptic number.

3906635 is a deficient number, since it is larger than the sum of its proper divisors (781333).

3906635 is an equidigital number, since it uses as much as digits as its factorization.

3906635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781332.

The product of its (nonzero) digits is 14580, while the sum is 32.

The square root of 3906635 is about 1976.5209333574. The cubic root of 3906635 is about 157.4953051427.

The spelling of 3906635 in words is "three million, nine hundred six thousand, six hundred thirty-five".