3928218 has 16 divisors (see below), whose sum is σ = 8978880. Its totient is φ = 1122336.

The previous prime is 3928189. The next prime is 3928229. The reversal of 3928218 is 8128293.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 46723 + ... + 46806.

It is an arithmetic number, because the mean of its divisors is an integer number (561180).

Almost surely, 2^3928218 is an apocalyptic number.

3928218 is an abundant number, since it is smaller than the sum of its proper divisors (5050662).

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

3928218 is a wasteful number, since it uses less digits than its factorization.

3928218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93541.

The product of its digits is 6912, while the sum is 33.

The square root of 3928218 is about 1981.9732591536. The cubic root of 3928218 is about 157.7848109379.

The spelling of 3928218 in words is "three million, nine hundred twenty-eight thousand, two hundred eighteen".