4228840 has 64 divisors (see below), whose sum is σ = 11871360. Its totient is φ = 1317120.

The previous prime is 4228837. The next prime is 4228843. The reversal of 4228840 is 488224.

It is an interprime number because it is at equal distance from previous prime (4228837) and next prime (4228843).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 4228799 and 4228808.

It is not an unprimeable number, because it can be changed into a prime (4228843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2394 + ... + 3766.

It is an arithmetic number, because the mean of its divisors is an integer number (185490).

Almost surely, 2^4228840 is an apocalyptic number.

4228840 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 4228840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5935680).

4228840 is an abundant number, since it is smaller than the sum of its proper divisors (7642520).

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

4228840 is a wasteful number, since it uses less digits than its factorization.

4228840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 4228840 is about 2056.4143551337. The cubic root of 4228840 is about 161.7113184252.

It can be divided in two parts, 42 and 28840, that added together give a palindrome (28882).

The spelling of 4228840 in words is "four million, two hundred twenty-eight thousand, eight hundred forty".