5518640 has 40 divisors (see below), whose sum is σ = 12976848. Its totient is φ = 2182400.

The previous prime is 5518633. The next prime is 5518673. The reversal of 5518640 is 468155.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7739 + ... + 8421.

Almost surely, 2^5518640 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 5518640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6488424).

5518640 is an abundant number, since it is smaller than the sum of its proper divisors (7458208).

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

5518640 is a wasteful number, since it uses less digits than its factorization.

5518640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 5518640 is about 2349.1785798445. The cubic root of 5518640 is about 176.7166031061.

The spelling of 5518640 in words is "five million, five hundred eighteen thousand, six hundred forty".