3865678938 has 128 divisors (see below), whose sum is σ = 9667123200. Its totient is φ = 1135036800.

The previous prime is 3865678913. The next prime is 3865678939. The reversal of 3865678938 is 8398765683.

3865678938 is a `hidden beast` number, since 38 + 6 + 567 + 8 + 9 + 38 = 666.

3865678938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3865678939) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2557603 + ... + 2559113.

It is an arithmetic number, because the mean of its divisors is an integer number (75524400).

Almost surely, 2^3865678938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3865678938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4833561600).

3865678938 is an abundant number, since it is smaller than the sum of its proper divisors (5801444262).

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

3865678938 is a wasteful number, since it uses less digits than its factorization.

3865678938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1659 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 3865678938 is about 62174.5843411920. The cubic root of 3865678938 is about 1569.4299170299.

The spelling of 3865678938 in words is "three billion, eight hundred sixty-five million, six hundred seventy-eight thousand, nine hundred thirty-eight".