218427198 has 32 divisors (see below), whose sum is σ = 477868032. Its totient is φ = 66009600.

The previous prime is 218427197. The next prime is 218427221. The reversal of 218427198 is 891724812.

It is a super-2 number, since 2×218427198² = 95420881652262408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218427191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20958 + ... + 29598.

It is an arithmetic number, because the mean of its divisors is an integer number (14933376).

Almost surely, 2^218427198 is an apocalyptic number.

218427198 is an abundant number, since it is smaller than the sum of its proper divisors (259440834).

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

218427198 is a wasteful number, since it uses less digits than its factorization.

218427198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9040.

The product of its digits is 64512, while the sum is 42.

The square root of 218427198 is about 14779.2827295508. The cubic root of 218427198 is about 602.2390396644.

The spelling of 218427198 in words is "two hundred eighteen million, four hundred twenty-seven thousand, one hundred ninety-eight".