3909222 has 40 divisors (see below), whose sum is σ = 8929800. Its totient is φ = 1277856.

The previous prime is 3909221. The next prime is 3909233. The reversal of 3909222 is 2229093.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909221) 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 19 ways as a sum of consecutive naturals, for example, 9354 + ... + 9762.

It is an arithmetic number, because the mean of its divisors is an integer number (223245).

Almost surely, 2^3909222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3909222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4464900).

3909222 is an abundant number, since it is smaller than the sum of its proper divisors (5020578).

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

3909222 is a wasteful number, since it uses less digits than its factorization.

3909222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3909222 is about 1977.1752577857. The cubic root of 3909222 is about 157.5300622888.

The spelling of 3909222 in words is "three million, nine hundred nine thousand, two hundred twenty-two".