273868218 has 72 divisors (see below), whose sum is σ = 647211708. Its totient is φ = 83655936.

The previous prime is 273868213. The next prime is 273868241. The reversal of 273868218 is 812868372.

It can be written as a sum of positive squares in 6 ways, for example, as 173527929 + 100340289 = 13173^2 + 10017^2 .

Its product of digits (258048) is a multiple of the sum of its prime divisors (672).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273868213) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 599046 + ... + 599502.

Almost surely, 2^273868218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 273868218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323605854).

273868218 is an abundant number, since it is smaller than the sum of its proper divisors (373343490).

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

273868218 is a wasteful number, since it uses less digits than its factorization.

273868218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 672 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 273868218 is about 16548.9642576205. The cubic root of 273868218 is about 649.4023840481.

The spelling of 273868218 in words is "two hundred seventy-three million, eight hundred sixty-eight thousand, two hundred eighteen".