3778781472 has 72 divisors (see below), whose sum is σ = 10841099724. Its totient is φ = 1248436224.

The previous prime is 3778781459. The next prime is 3778781533. The reversal of 3778781472 is 2741878773.

3778781472 is a `hidden beast` number, since 37 + 78 + 78 + 1 + 472 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3341302416 + 437479056 = 57804^2 + 20916^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25513 + ... + 90600.

Almost surely, 2^3778781472 is an apocalyptic number.

3778781472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3778781472 is an abundant number, since it is smaller than the sum of its proper divisors (7062318252).

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

3778781472 is a wasteful number, since it uses less digits than its factorization.

3778781472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116242 (or 116231 counting only the distinct ones).

The product of its digits is 3687936, while the sum is 54.

The square root of 3778781472 is about 61471.7941173023. The cubic root of 3778781472 is about 1557.5808263369.

The spelling of 3778781472 in words is "three billion, seven hundred seventy-eight million, seven hundred eighty-one thousand, four hundred seventy-two".