3781584220 has 24 divisors (see below), whose sum is σ = 7957653984. Its totient is φ = 1509523776.

The previous prime is 3781584203. The next prime is 3781584221. The reversal of 3781584220 is 224851873.

It is a happy number.

3781584220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781584221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184387 + ... + 203866.

It is an arithmetic number, because the mean of its divisors is an integer number (331568916).

Almost surely, 2^3781584220 is an apocalyptic number.

It is an amenable number.

3781584220 is an abundant number, since it is smaller than the sum of its proper divisors (4176069764).

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

3781584220 is a wasteful number, since it uses less digits than its factorization.

3781584220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388749 (or 388747 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 3781584220 is about 61494.5869162482. The cubic root of 3781584220 is about 1557.9658206103.

The spelling of 3781584220 in words is "three billion, seven hundred eighty-one million, five hundred eighty-four thousand, two hundred twenty".