4543240 has 32 divisors (see below), whose sum is σ = 11009880. Its totient is φ = 1677312.

The previous prime is 4543237. The next prime is 4543241. The reversal of 4543240 is 423454.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2566404 + 1976836 = 1602^2 + 1406^2 .

It is not an unprimeable number, because it can be changed into a prime (4543241) 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, 3849 + ... + 4888.

Almost surely, 2^4543240 is an apocalyptic number.

4543240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4543240 is an abundant number, since it is smaller than the sum of its proper divisors (6466640).

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

4543240 is a wasteful number, since it uses less digits than its factorization.

4543240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8761 (or 8757 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 4543240 is about 2131.4877433380. The cubic root of 4543240 is about 165.6234752441.

Adding to 4543240 its reverse (423454), we get a palindrome (4966694).

The spelling of 4543240 in words is "four million, five hundred forty-three thousand, two hundred forty".