3886155438 has 64 divisors (see below), whose sum is σ = 8635963392. Its totient is φ = 1155962880.

The previous prime is 3886155421. The next prime is 3886155457. The reversal of 3886155438 is 8345516883.

It is a happy number.

3886155438 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1072606 + ... + 1076222.

It is an arithmetic number, because the mean of its divisors is an integer number (134936928).

Almost surely, 2^3886155438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3886155438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4317981696).

3886155438 is an abundant number, since it is smaller than the sum of its proper divisors (4749807954).

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

3886155438 is a wasteful number, since it uses less digits than its factorization.

3886155438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929.

The product of its digits is 2764800, while the sum is 51.

The square root of 3886155438 is about 62339.0362293162. The cubic root of 3886155438 is about 1572.1961284665.

The spelling of 3886155438 in words is "three billion, eight hundred eighty-six million, one hundred fifty-five thousand, four hundred thirty-eight".