618810228 has 36 divisors (see below), whose sum is σ = 1566059040. Its totient is φ = 206026896.

The previous prime is 618810197. The next prime is 618810233. The reversal of 618810228 is 822018816.

618810228 is a `hidden beast` number, since 618 + 8 + 10 + 2 + 28 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 618810192 and 618810201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22243 + ... + 41621.

It is an arithmetic number, because the mean of its divisors is an integer number (43501640).

Almost surely, 2^618810228 is an apocalyptic number.

It is an amenable number.

618810228 is an abundant number, since it is smaller than the sum of its proper divisors (947248812).

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

618810228 is a wasteful number, since it uses less digits than its factorization.

618810228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20276 (or 20271 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 618810228 is about 24875.8965265576. The cubic root of 618810228 is about 852.1561077440.

The spelling of 618810228 in words is "six hundred eighteen million, eight hundred ten thousand, two hundred twenty-eight".