218294028 has 30 divisors (see below), whose sum is σ = 570664556. Its totient is φ = 72764568.

The previous prime is 218294003. The next prime is 218294047. The reversal of 218294028 is 820492812.

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 = 218293983 and 218294001.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 336550 + ... + 337197.

Almost surely, 2^218294028 is an apocalyptic number.

It is an amenable number.

218294028 is an abundant number, since it is smaller than the sum of its proper divisors (352370528).

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

218294028 is a wasteful number, since it uses less digits than its factorization.

218294028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673763 (or 673752 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 218294028 is about 14774.7767495824. The cubic root of 218294028 is about 602.1166243884.

The spelling of 218294028 in words is "two hundred eighteen million, two hundred ninety-four thousand, twenty-eight".