4428138 has 48 divisors (see below), whose sum is σ = 10488096. Its totient is φ = 1235520.

The previous prime is 4428113. The next prime is 4428139. The reversal of 4428138 is 8318244.

It is a super-2 number, since 2×4428138² = 39216812294088, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (4428139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10956 + ... + 11352.

It is an arithmetic number, because the mean of its divisors is an integer number (218502).

Almost surely, 2^4428138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4428138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5244048).

4428138 is an abundant number, since it is smaller than the sum of its proper divisors (6059958).

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

4428138 is a wasteful number, since it uses less digits than its factorization.

4428138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 426 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 4428138 is about 2104.3141400466. The cubic root of 4428138 is about 164.2128161230.

It can be divided in two parts, 44 and 28138, that added together give a palindrome (28182).

The spelling of 4428138 in words is "four million, four hundred twenty-eight thousand, one hundred thirty-eight".