4544640 has 128 divisors (see below), whose sum is σ = 16156800. Its totient is φ = 1207296.

The previous prime is 4544623. The next prime is 4544641. The reversal of 4544640 is 464454.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (4544641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17149 + ... + 17411.

It is an arithmetic number, because the mean of its divisors is an integer number (126225).

Almost surely, 2^4544640 is an apocalyptic number.

4544640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8078400).

4544640 is an abundant number, since it is smaller than the sum of its proper divisors (11612160).

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

4544640 is a wasteful number, since it uses less digits than its factorization.

4544640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 4544640 is about 2131.8161271554. The cubic root of 4544640 is about 165.6404857954.

It can be divided in two parts, 4544 and 640, that added together give a square (5184 = 72²).

The spelling of 4544640 in words is "four million, five hundred forty-four thousand, six hundred forty".