4518644 has 24 divisors (see below), whose sum is σ = 8602440. Its totient is φ = 2064384.

The previous prime is 4518643. The next prime is 4518667. The reversal of 4518644 is 4468154.

It can be written as a sum of positive squares in 4 ways, for example, as 150544 + 4368100 = 388^2 + 2090^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4518644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4518641) 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, 5492 + ... + 6260.

It is an arithmetic number, because the mean of its divisors is an integer number (358435).

Almost surely, 2^4518644 is an apocalyptic number.

It is an amenable number.

4518644 is a deficient number, since it is larger than the sum of its proper divisors (4083796).

4518644 is a wasteful number, since it uses less digits than its factorization.

4518644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 897 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 4518644 is about 2125.7102342511. The cubic root of 4518644 is about 165.3240524765.

The spelling of 4518644 in words is "four million, five hundred eighteen thousand, six hundred forty-four".