3906220 has 12 divisors (see below), whose sum is σ = 8203104. Its totient is φ = 1562480.

The previous prime is 3906187. The next prime is 3906247. The reversal of 3906220 is 226093.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 3906191 and 3906200.

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, 97636 + ... + 97675.

It is an arithmetic number, because the mean of its divisors is an integer number (683592).

Almost surely, 2^3906220 is an apocalyptic number.

It is an amenable number.

3906220 is an abundant number, since it is smaller than the sum of its proper divisors (4296884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3906220 is a wasteful number, since it uses less digits than its factorization.

3906220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195320 (or 195318 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 3906220 is about 1976.4159481243. The cubic root of 3906220 is about 157.4897280611.

The spelling of 3906220 in words is "three million, nine hundred six thousand, two hundred twenty".