618930 has 72 divisors (see below), whose sum is σ = 1811628. Its totient is φ = 145728.

The previous prime is 618929. The next prime is 618941. The reversal of 618930 is 39816.

618930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 576081 + 42849 = 759^2 + 207^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 618894 and 618903.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26899 + ... + 26921.

2⁶¹⁸⁹³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905814).

618930 is an abundant number, since it is smaller than the sum of its proper divisors (1192698).

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

618930 is a wasteful number, since it uses less digits than its factorization.

618930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 618930 is about 786.7210433184. The cubic root of 618930 is about 85.2211083057.

The spelling of 618930 in words is "six hundred eighteen thousand, nine hundred thirty".