3784220 has 48 divisors (see below), whose sum is σ = 8805888. Its totient is φ = 1354560.

The previous prime is 3784199. The next prime is 3784223. The reversal of 3784220 is 224873.

It is a self number, because there is not a number n which added to its sum of digits gives 3784220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3784223) 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 15 ways as a sum of consecutive naturals, for example, 22577 + ... + 22743.

It is an arithmetic number, because the mean of its divisors is an integer number (183456).

Almost surely, 2^3784220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3784220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4402944).

3784220 is an abundant number, since it is smaller than the sum of its proper divisors (5021668).

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

3784220 is a wasteful number, since it uses less digits than its factorization.

3784220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 3784220 is about 1945.3071736875. The cubic root of 3784220 is about 155.8327706107.

It can be divided in two parts, 3784 and 220, that added together give a palindrome (4004).

The spelling of 3784220 in words is "three million, seven hundred eighty-four thousand, two hundred twenty".