4530440 has 32 divisors (see below), whose sum is σ = 10390680. Its totient is φ = 1777152.

The previous prime is 4530431. The next prime is 4530443. The reversal of 4530440 is 440354.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2937796 + 1592644 = 1714^2 + 1262^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (4530443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052 + ... + 3188.

Almost surely, 2^4530440 is an apocalyptic number.

4530440 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 4530440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5195340).

4530440 is an abundant number, since it is smaller than the sum of its proper divisors (5860240).

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

4530440 is a wasteful number, since it uses less digits than its factorization.

4530440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201 (or 2197 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 4530440 is about 2128.4830278863. The cubic root of 4530440 is about 165.4677879277.

Adding to 4530440 its reverse (440354), we get a palindrome (4970794).

The spelling of 4530440 in words is "four million, five hundred thirty thousand, four hundred forty".