4428840 has 128 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 1019904.

The previous prime is 4428833. The next prime is 4428847. The reversal of 4428840 is 488244.

It is an interprime number because it is at equal distance from previous prime (4428833) and next prime (4428847).

It is a super-2 number, since 2×4428840² = 39229247491200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 4428798 and 4428807.

It is not an unprimeable number, because it can be changed into a prime (4428847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26437 + ... + 26603.

It is an arithmetic number, because the mean of its divisors is an integer number (119070).

Almost surely, 2^4428840 is an apocalyptic number.

4428840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4428840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7620480).

4428840 is an abundant number, since it is smaller than the sum of its proper divisors (10812120).

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

4428840 is a wasteful number, since it uses less digits than its factorization.

4428840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 4428840 is about 2104.4809336271. The cubic root of 4428840 is about 164.2214933071.

The spelling of 4428840 in words is "four million, four hundred twenty-eight thousand, eight hundred forty".