3884428638 has 24 divisors (see below), whose sum is σ = 8554235976. Its totient is φ = 1273582800.

The previous prime is 3884428633. The next prime is 3884428661. The reversal of 3884428638 is 8368244883.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3884428631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1767768 + ... + 1769963.

It is an arithmetic number, because the mean of its divisors is an integer number (356426499).

Almost surely, 2^3884428638 is an apocalyptic number.

3884428638 is an abundant number, since it is smaller than the sum of its proper divisors (4669807338).

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

3884428638 is a wasteful number, since it uses less digits than its factorization.

3884428638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537800 (or 3537797 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 54.

The square root of 3884428638 is about 62325.1846206652. The cubic root of 3884428638 is about 1571.9632272928.

The spelling of 3884428638 in words is "three billion, eight hundred eighty-four million, four hundred twenty-eight thousand, six hundred thirty-eight".