4540440 has 64 divisors (see below), whose sum is σ = 13764960. Its totient is φ = 1198080.

The previous prime is 4540439. The next prime is 4540469. The reversal of 4540440 is 440454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18720 + ... + 18960.

Almost surely, 2^4540440 is an apocalyptic number.

4540440 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 4540440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6882480).

4540440 is an abundant number, since it is smaller than the sum of its proper divisors (9224520).

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

4540440 is a wasteful number, since it uses less digits than its factorization.

4540440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4540440 is about 2130.8308238807. The cubic root of 4540440 is about 165.5894436548.

Adding to 4540440 its reverse (440454), we get a palindrome (4980894).

The spelling of 4540440 in words is "four million, five hundred forty thousand, four hundred forty".