3782778944 has 28 divisors (see below), whose sum is σ = 8578803264. Its totient is φ = 1621190784.

The previous prime is 3782778931. The next prime is 3782778949. The reversal of 3782778944 is 4498772873.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (3782778949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4221404 + ... + 4222299.

Almost surely, 2^3782778944 is an apocalyptic number.

It is an amenable number.

3782778944 is an abundant number, since it is smaller than the sum of its proper divisors (4796024320).

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

3782778944 is an equidigital number, since it uses as much as digits as its factorization.

3782778944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443722 (or 8443712 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 59.

The square root of 3782778944 is about 61504.3002073839. The cubic root of 3782778944 is about 1558.1298738275.

The spelling of 3782778944 in words is "three billion, seven hundred eighty-two million, seven hundred seventy-eight thousand, nine hundred forty-four".