5444640 has 144 divisors (see below), whose sum is σ = 19656000. Its totient is φ = 1368576.

The previous prime is 5444639. The next prime is 5444651. The reversal of 5444640 is 464445.

It is a tau number, because it is divible by the number of its divisors (144).

It is an Ulam number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 27261 + ... + 27459.

It is an arithmetic number, because the mean of its divisors is an integer number (136500).

Almost surely, 2^5444640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5444640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9828000).

5444640 is an abundant number, since it is smaller than the sum of its proper divisors (14211360).

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

5444640 is a wasteful number, since it uses less digits than its factorization.

5444640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 228 counting only the distinct ones).

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

The square root of 5444640 is about 2333.3752377190. The cubic root of 5444640 is about 175.9231758375.

It can be divided in two parts, 5444 and 640, that added together give a square (6084 = 78²).

The spelling of 5444640 in words is "five million, four hundred forty-four thousand, six hundred forty".