3918222 has 72 divisors (see below), whose sum is σ = 10705968. Its totient is φ = 1013760.

The previous prime is 3918209. The next prime is 3918251. The reversal of 3918222 is 2228193.

It is a happy number.

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 35 ways as a sum of consecutive naturals, for example, 15118 + ... + 15374.

It is an arithmetic number, because the mean of its divisors is an integer number (148694).

Almost surely, 2^3918222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3918222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5352984).

3918222 is an abundant number, since it is smaller than the sum of its proper divisors (6787746).

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

3918222 is a wasteful number, since it uses less digits than its factorization.

3918222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 280 counting only the distinct ones).

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

The square root of 3918222 is about 1979.4499235899. The cubic root of 3918222 is about 157.6508607435.

It can be divided in two parts, 39182 and 22, that added together give a square (39204 = 198²).

The spelling of 3918222 in words is "three million, nine hundred eighteen thousand, two hundred twenty-two".