5531640 has 64 divisors (see below), whose sum is σ = 17141760. Its totient is φ = 1426560.

The previous prime is 5531639. The next prime is 5531651. The reversal of 5531640 is 461355.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 5531640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2977 + ... + 4463.

It is an arithmetic number, because the mean of its divisors is an integer number (267840).

Almost surely, 2^5531640 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 5531640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8570880).

5531640 is an abundant number, since it is smaller than the sum of its proper divisors (11610120).

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

5531640 is a wasteful number, since it uses less digits than its factorization.

5531640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 5531640 is about 2351.9438768814. The cubic root of 5531640 is about 176.8552552803.

Adding to 5531640 its reverse (461355), we get a palindrome (5992995).

The spelling of 5531640 in words is "five million, five hundred thirty-one thousand, six hundred forty".