4138888 has 32 divisors (see below), whose sum is σ = 8852760. Its totient is φ = 1797120.

The previous prime is 4138877. The next prime is 4138933. The reversal of 4138888 is 8888314.

It can be written as a sum of positive squares in 4 ways, for example, as 3617604 + 521284 = 1902^2 + 722^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4138888.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598 + ... + 2938.

Almost surely, 2^4138888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4138888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4426380).

4138888 is an abundant number, since it is smaller than the sum of its proper divisors (4713872).

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

4138888 is a wasteful number, since it uses less digits than its factorization.

4138888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377 (or 2373 counting only the distinct ones).

The product of its digits is 49152, while the sum is 40.

The square root of 4138888 is about 2034.4257174938. The cubic root of 4138888 is about 160.5564996816.

The spelling of 4138888 in words is "four million, one hundred thirty-eight thousand, eight hundred eighty-eight".