378644220 has 120 divisors (see below), whose sum is σ = 1213337664. Its totient is φ = 98803584.

The previous prime is 378644219. The next prime is 378644221. The reversal of 378644220 is 22446873.

378644220 is a `hidden beast` number, since 3 + 7 + 8 + 644 + 2 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (378644219) and next prime (378644221).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378644221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 73654 + ... + 78626.

Almost surely, 2^378644220 is an apocalyptic number.

378644220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 378644220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (606668832).

378644220 is an abundant number, since it is smaller than the sum of its proper divisors (834693444).

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

378644220 is a wasteful number, since it uses less digits than its factorization.

378644220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041 (or 5030 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 378644220 is about 19458.7825929579. The cubic root of 378644220 is about 723.4532032271.

The spelling of 378644220 in words is "three hundred seventy-eight million, six hundred forty-four thousand, two hundred twenty".