3784218256 has 105 divisors (see below), whose sum is σ = 9239718981. Its totient is φ = 1497053376.

The previous prime is 3784218227. The next prime is 3784218259. The reversal of 3784218256 is 6528124873.

The square root of 3784218256 is 61516.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 3246720400 + 537497856 = 56980^2 + 23184^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3784218259) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 291093706 + ... + 291093718.

Almost surely, 2^3784218256 is an apocalyptic number.

3784218256 is the 61516-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3784218256

3784218256 is an abundant number, since it is smaller than the sum of its proper divisors (5455500725).

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

3784218256 is an frugal number, since it uses more digits than its factorization.

3784218256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 22 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The cubic root of 3784218256 is about 1558.3274667158.

The spelling of 3784218256 in words is "three billion, seven hundred eighty-four million, two hundred eighteen thousand, two hundred fifty-six".