3947285 has 8 divisors (see below), whose sum is σ = 4751520. Its totient is φ = 3147984.

The previous prime is 3947233. The next prime is 3947297. The reversal of 3947285 is 5827493.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947285 is a prime.

It is a congruent 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, 854 + ... + 2936.

It is an arithmetic number, because the mean of its divisors is an integer number (593940).

Almost surely, 2^3947285 is an apocalyptic number.

It is an amenable number.

3947285 is a deficient number, since it is larger than the sum of its proper divisors (804235).

3947285 is a wasteful number, since it uses less digits than its factorization.

3947285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467.

The product of its digits is 60480, while the sum is 38.

The square root of 3947285 is about 1986.7775416488. Note that the first 3 decimals coincide. The cubic root of 3947285 is about 158.0396871943.

The spelling of 3947285 in words is "three million, nine hundred forty-seven thousand, two hundred eighty-five".