3981222 has 48 divisors (see below), whose sum is σ = 10383360. Its totient is φ = 1076976.

The previous prime is 3981217. The next prime is 3981227. The reversal of 3981222 is 2221893.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3981217) and next prime (3981227).

It is a super-2 number, since 2×3981222² = 31700257226568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1563 + ... + 3225.

It is an arithmetic number, because the mean of its divisors is an integer number (216320).

Almost surely, 2^3981222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3981222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5191680).

3981222 is an abundant number, since it is smaller than the sum of its proper divisors (6402138).

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

3981222 is a wasteful number, since it uses less digits than its factorization.

3981222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1694 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 3981222 is about 1995.2999774470. The cubic root of 3981222 is about 158.4913136645.

The spelling of 3981222 in words is "three million, nine hundred eighty-one thousand, two hundred twenty-two".