3920217 has 32 divisors (see below), whose sum is σ = 6451200. Its totient is φ = 2066688.

The previous prime is 3920209. The next prime is 3920227. The reversal of 3920217 is 7120293.

It is not a de Polignac number, because 3920217 - 2³ = 3920209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920227) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 28134 + ... + 28272.

It is an arithmetic number, because the mean of its divisors is an integer number (201600).

Almost surely, 2^3920217 is an apocalyptic number.

It is an amenable number.

3920217 is a deficient number, since it is larger than the sum of its proper divisors (2530983).

3920217 is a wasteful number, since it uses less digits than its factorization.

3920217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 3920217 is about 1979.9537873395. The cubic root of 3920217 is about 157.6776126821.

The spelling of 3920217 in words is "three million, nine hundred twenty thousand, two hundred seventeen".