3683777778 has 40 divisors (see below), whose sum is σ = 8279449200. Its totient is φ = 1224198360.

The previous prime is 3683777759. The next prime is 3683777789. The reversal of 3683777778 is 8777773863.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19273 + ... + 87971.

It is an arithmetic number, because the mean of its divisors is an integer number (206986230).

Almost surely, 2^3683777778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3683777778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4139724600).

3683777778 is an abundant number, since it is smaller than the sum of its proper divisors (4595671422).

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

3683777778 is a wasteful number, since it uses less digits than its factorization.

3683777778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69044 (or 69035 counting only the distinct ones).

The product of its digits is 58084992, while the sum is 63.

The square root of 3683777778 is about 60694.1329784025. The cubic root of 3683777778 is about 1544.4166484659.

The spelling of 3683777778 in words is "three billion, six hundred eighty-three million, seven hundred seventy-seven thousand, seven hundred seventy-eight".