4423540 has 24 divisors (see below), whose sum is σ = 10134432. Its totient is φ = 1608480.

The previous prime is 4423511. The next prime is 4423543. The reversal of 4423540 is 453244.

4423540 = 350² + 351² + ... + 382².

It is a happy number.

It is a super-2 number, since 2×4423540² = 39135412263200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4423543) 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, 9834 + ... + 10273.

It is an arithmetic number, because the mean of its divisors is an integer number (422268).

Almost surely, 2^4423540 is an apocalyptic number.

It is an amenable number.

4423540 is an abundant number, since it is smaller than the sum of its proper divisors (5710892).

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

4423540 is a wasteful number, since it uses less digits than its factorization.

4423540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20127 (or 20125 counting only the distinct ones).

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

The square root of 4423540 is about 2103.2213388039. The cubic root of 4423540 is about 164.1559591162.

Adding to 4423540 its reverse (453244), we get a palindrome (4876784).

The spelling of 4423540 in words is "four million, four hundred twenty-three thousand, five hundred forty".