618856 has 32 divisors (see below), whose sum is σ = 1362240. Its totient is φ = 258048.

The previous prime is 618847. The next prime is 618857. The reversal of 618856 is 658816.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (618857) by changing a digit.

618856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2280 + ... + 2536.

It is an arithmetic number, because the mean of its divisors is an integer number (42570).

2⁶¹⁸⁸⁵⁶ 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 618856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681120).

618856 is an abundant number, since it is smaller than the sum of its proper divisors (743384).

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

618856 is a wasteful number, since it uses less digits than its factorization.

618856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 309 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 618856 is about 786.6740112651. The cubic root of 618856 is about 85.2177117916.

It can be divided in two parts, 6188 and 56, that multiplied together give a triangular number (346528 = T₈₃₂).

The spelling of 618856 in words is "six hundred eighteen thousand, eight hundred fifty-six".