618580 has 24 divisors (see below), whose sum is σ = 1313928. Its totient is φ = 244608.

The previous prime is 618577. The next prime is 618581. The reversal of 618580 is 85816.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 161604 + 456976 = 402^2 + 676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618581) 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, 3042 + ... + 3238.

It is an arithmetic number, because the mean of its divisors is an integer number (54747).

2⁶¹⁸⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

618580 is an abundant number, since it is smaller than the sum of its proper divisors (695348).

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

618580 is a wasteful number, since it uses less digits than its factorization.

618580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 618580 is about 786.4985696109. The cubic root of 618580 is about 85.2050413234.

The spelling of 618580 in words is "six hundred eighteen thousand, five hundred eighty".