3930905 has 8 divisors (see below), whose sum is σ = 5145984. Its totient is φ = 2858800.

The previous prime is 3930887. The next prime is 3930919. The reversal of 3930905 is 5090393.

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

It is not a de Polignac number, because 3930905 - 2⁶ = 3930841 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

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, 35681 + ... + 35790.

It is an arithmetic number, because the mean of its divisors is an integer number (643248).

Almost surely, 2^3930905 is an apocalyptic number.

It is an amenable number.

3930905 is a deficient number, since it is larger than the sum of its proper divisors (1215079).

3930905 is a wasteful number, since it uses less digits than its factorization.

3930905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71487.

The product of its (nonzero) digits is 3645, while the sum is 29.

The square root of 3930905 is about 1982.6510030764. The cubic root of 3930905 is about 157.8207789991.

The spelling of 3930905 in words is "three million, nine hundred thirty thousand, nine hundred five".