3946905 has 24 divisors (see below), whose sum is σ = 6901440. Its totient is φ = 2086560.

The previous prime is 3946879. The next prime is 3946913. The reversal of 3946905 is 5096493.

It is a de Polignac number, because none of the positive numbers 2^k-3946905 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3946905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5940 + ... + 6570.

It is an arithmetic number, because the mean of its divisors is an integer number (287560).

Almost surely, 2^3946905 is an apocalyptic number.

It is an amenable number.

3946905 is a deficient number, since it is larger than the sum of its proper divisors (2954535).

3946905 is a wasteful number, since it uses less digits than its factorization.

3946905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 3946905 is about 1986.6819071004. The cubic root of 3946905 is about 158.0346156064.

It can be divided in two parts, 3946 and 905, that added together give a triangular number (4851 = T₉₈).

The spelling of 3946905 in words is "three million, nine hundred forty-six thousand, nine hundred five".