218873830 has 64 divisors (see below), whose sum is σ = 466808832. Its totient is φ = 72334080.

The previous prime is 218873821. The next prime is 218873869. The reversal of 218873830 is 38378812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233122 + ... + 234058.

It is an arithmetic number, because the mean of its divisors is an integer number (7293888).

Almost surely, 2^218873830 is an apocalyptic number.

218873830 is an abundant number, since it is smaller than the sum of its proper divisors (247935002).

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

218873830 is a wasteful number, since it uses less digits than its factorization.

218873830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 218873830 is about 14794.3850835376. The cubic root of 218873830 is about 602.6492390416.

The spelling of 218873830 in words is "two hundred eighteen million, eight hundred seventy-three thousand, eight hundred thirty".