4431420 has 72 divisors (see below), whose sum is σ = 15366624. Its totient is φ = 1012608.

The previous prime is 4431367. The next prime is 4431443. The reversal of 4431420 is 241344.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4431393 and 4431402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499 + ... + 3018.

Almost surely, 2^4431420 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 4431420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7683312).

4431420 is an abundant number, since it is smaller than the sum of its proper divisors (10935204).

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

4431420 is a wasteful number, since it uses less digits than its factorization.

4431420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539 (or 3534 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4431420 is about 2105.0938221372. The cubic root of 4431420 is about 164.2533759375.

Adding to 4431420 its reverse (241344), we get a palindrome (4672764).

It can be divided in two parts, 4431 and 420, that added together give a triangular number (4851 = T₉₈).

The spelling of 4431420 in words is "four million, four hundred thirty-one thousand, four hundred twenty".