218228678 has 8 divisors (see below), whose sum is σ = 329540400. Its totient is φ = 108381880.

The previous prime is 218228657. The next prime is 218228693. The reversal of 218228678 is 876822812.

218228678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365858 + ... + 366453.

It is an arithmetic number, because the mean of its divisors is an integer number (41192550).

Almost surely, 2^218228678 is an apocalyptic number.

218228678 is a deficient number, since it is larger than the sum of its proper divisors (111311722).

218228678 is a wasteful number, since it uses less digits than its factorization.

218228678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732462.

The product of its digits is 172032, while the sum is 44.

The square root of 218228678 is about 14772.5650447036. The cubic root of 218228678 is about 602.0565338018.

The spelling of 218228678 in words is "two hundred eighteen million, two hundred twenty-eight thousand, six hundred seventy-eight".