378216220 has 48 divisors (see below), whose sum is σ = 821812320. Its totient is φ = 146098944.

The previous prime is 378216211. The next prime is 378216253. The reversal of 378216220 is 22612873.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101022 + ... + 104698.

It is an arithmetic number, because the mean of its divisors is an integer number (17121090).

Almost surely, 2^378216220 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 378216220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410906160).

378216220 is an abundant number, since it is smaller than the sum of its proper divisors (443596100).

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

378216220 is a wasteful number, since it uses less digits than its factorization.

378216220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862 (or 3860 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 378216220 is about 19447.7818786616. The cubic root of 378216220 is about 723.1805156625.

It can be divided in two parts, 3782 and 16220, that added together give a palindrome (20002).

The spelling of 378216220 in words is "three hundred seventy-eight million, two hundred sixteen thousand, two hundred twenty".