4518640 has 40 divisors (see below), whose sum is σ = 12008160. Its totient is φ = 1549056.

The previous prime is 4518623. The next prime is 4518641. The reversal of 4518640 is 468154.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 4518599 and 4518608.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3475 + ... + 4594.

It is an arithmetic number, because the mean of its divisors is an integer number (300204).

Almost surely, 2^4518640 is an apocalyptic number.

4518640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4518640 is an abundant number, since it is smaller than the sum of its proper divisors (7489520).

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

4518640 is a wasteful number, since it uses less digits than its factorization.

4518640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089 (or 8083 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 4518640 is about 2125.7092933889. The cubic root of 4518640 is about 165.3240036937.

The spelling of 4518640 in words is "four million, five hundred eighteen thousand, six hundred forty".