4540140 has 72 divisors (see below), whose sum is σ = 15030288. Its totient is φ = 1100160.

The previous prime is 4540127. The next prime is 4540147. The reversal of 4540140 is 410454.

4540140 = T₃₁ + T₃₂ + ... + T₃₀₀.

It is a super-2 number, since 2×4540140² = 41225742439200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (4540147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 834 + ... + 3126.

It is an arithmetic number, because the mean of its divisors is an integer number (208754).

Almost surely, 2^4540140 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 4540140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7515144).

4540140 is an abundant number, since it is smaller than the sum of its proper divisors (10490148).

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

4540140 is a wasteful number, since it uses less digits than its factorization.

4540140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319 (or 2314 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4540140 is about 2130.7604276408. The cubic root of 4540140 is about 165.5857965834.

Adding to 4540140 its reverse (410454), we get a palindrome (4950594).

The spelling of 4540140 in words is "four million, five hundred forty thousand, one hundred forty".