3778218 has 64 divisors (see below), whose sum is σ = 9047040. Its totient is φ = 1166400.

The previous prime is 3778217. The next prime is 3778237. The reversal of 3778218 is 8128773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61908 + ... + 61968.

It is an arithmetic number, because the mean of its divisors is an integer number (141360).

Almost surely, 2^3778218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3778218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4523520).

3778218 is an abundant number, since it is smaller than the sum of its proper divisors (5268822).

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

3778218 is a wasteful number, since it uses less digits than its factorization.

3778218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 134 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 3778218 is about 1943.7638745486. The cubic root of 3778218 is about 155.7503403071.

The spelling of 3778218 in words is "three million, seven hundred seventy-eight thousand, two hundred eighteen".