5618440 has 64 divisors (see below), whose sum is σ = 13685760. Its totient is φ = 2069760.

The previous prime is 5618429. The next prime is 5618441. The reversal of 5618440 is 448165.

5618440 = 605² + 606² + ... + 619².

It is a junction number, because it is equal to n+sod(n) for n = 5618399 and 5618408.

It is not an unprimeable number, because it can be changed into a prime (5618441) 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 15 ways as a sum of consecutive naturals, for example, 28422 + ... + 28618.

It is an arithmetic number, because the mean of its divisors is an integer number (213840).

Almost surely, 2^5618440 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 5618440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6842880).

5618440 is an abundant number, since it is smaller than the sum of its proper divisors (8067320).

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

5618440 is a wasteful number, since it uses less digits than its factorization.

5618440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 258 counting only the distinct ones).

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

The square root of 5618440 is about 2370.3248722485. The cubic root of 5618440 is about 177.7755028644.

It can be divided in two parts, 56 and 18440, that added together give a square (18496 = 136²).

The spelling of 5618440 in words is "five million, six hundred eighteen thousand, four hundred forty".