4540240 has 80 divisors (see below), whose sum is σ = 11606400. Its totient is φ = 1645056.

The previous prime is 4540231. The next prime is 4540303. The reversal of 4540240 is 420454.

4540240 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×4540240² = 41227558515200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44029 + ... + 44131.

It is an arithmetic number, because the mean of its divisors is an integer number (145080).

Almost surely, 2^4540240 is an apocalyptic number.

4540240 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 4540240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5803200).

4540240 is an abundant number, since it is smaller than the sum of its proper divisors (7066160).

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

4540240 is a wasteful number, since it uses less digits than its factorization.

4540240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 4540240 is about 2130.7838933125. The cubic root of 4540240 is about 165.5870122917.

Adding to 4540240 its reverse (420454), we get a palindrome (4960694).

The spelling of 4540240 in words is "four million, five hundred forty thousand, two hundred forty".