218082858 has 16 divisors (see below), whose sum is σ = 498475200. Its totient is φ = 62309376.

The previous prime is 218082857. The next prime is 218082877. The reversal of 218082858 is 858280812.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 5192449 = 218082858 / (2 + 1 + 8 + 0 + 8 + 2 + 8 + 5 + 8).

It is not an unprimeable number, because it can be changed into a prime (218082853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2596183 + ... + 2596266.

It is an arithmetic number, because the mean of its divisors is an integer number (31154700).

Almost surely, 2^218082858 is an apocalyptic number.

218082858 is an abundant number, since it is smaller than the sum of its proper divisors (280392342).

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

218082858 is a wasteful number, since it uses less digits than its factorization.

218082858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192461.

The product of its (nonzero) digits is 81920, while the sum is 42.

The square root of 218082858 is about 14767.6287196015. The cubic root of 218082858 is about 601.9224062344.

The spelling of 218082858 in words is "two hundred eighteen million, eighty-two thousand, eight hundred fifty-eight".