618320 has 40 divisors (see below), whose sum is σ = 1473120. Its totient is φ = 241280.

The previous prime is 618311. The next prime is 618323. The reversal of 618320 is 23816.

618320 = T₂₄ + T₂₅ + ... + T₁₅₄.

618320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 618292 and 618301.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 618320.

It is not an unprimeable number, because it can be changed into a prime (618323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4655 + ... + 4785.

It is an arithmetic number, because the mean of its divisors is an integer number (36828).

2⁶¹⁸³²⁰ 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 618320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736560).

618320 is an abundant number, since it is smaller than the sum of its proper divisors (854800).

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

618320 is a wasteful number, since it uses less digits than its factorization.

618320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 618320 is about 786.3332626819. Note that the first 3 decimals coincide. The cubic root of 618320 is about 85.1931019271.

The spelling of 618320 in words is "six hundred eighteen thousand, three hundred twenty".