3684447778 has 16 divisors (see below), whose sum is σ = 6063952896. Its totient is φ = 1665066640.

The previous prime is 3684447773. The next prime is 3684447803. The reversal of 3684447778 is 8777444863.

It is a happy number.

3684447778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3684447773) 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, 480226 + ... + 487837.

It is an arithmetic number, because the mean of its divisors is an integer number (378997056).

Almost surely, 2^3684447778 is an apocalyptic number.

3684447778 is a deficient number, since it is larger than the sum of its proper divisors (2379505118).

3684447778 is a wasteful number, since it uses less digits than its factorization.

3684447778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968249.

The product of its digits is 25288704, while the sum is 58.

The square root of 3684447778 is about 60699.6522065819. The cubic root of 3684447778 is about 1544.5102748543.

The spelling of 3684447778 in words is "three billion, six hundred eighty-four million, four hundred forty-seven thousand, seven hundred seventy-eight".