618228 has 36 divisors (see below), whose sum is σ = 1684228. Its totient is φ = 190080.

The previous prime is 618227. The next prime is 618229. The reversal of 618228 is 822816.

It is an interprime number because it is at equal distance from previous prime (618227) and next prime (618229).

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 272484 = 588^2 + 522^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193 + ... + 1128.

2⁶¹⁸²²⁸ is an apocalyptic number.

It is an amenable number.

618228 is an abundant number, since it is smaller than the sum of its proper divisors (1066000).

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

618228 is a wasteful number, since it uses less digits than its factorization.

618228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1339 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 618228 is about 786.2747611363. The cubic root of 618228 is about 85.1888764159.

The spelling of 618228 in words is "six hundred eighteen thousand, two hundred twenty-eight".