218334930 has 32 divisors (see below), whose sum is σ = 571641408. Its totient is φ = 52929600.

The previous prime is 218334923. The next prime is 218334943. The reversal of 218334930 is 39433812.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 218334891 and 218334900.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330481 + ... + 331140.

It is an arithmetic number, because the mean of its divisors is an integer number (17863794).

Almost surely, 2^218334930 is an apocalyptic number.

218334930 is an abundant number, since it is smaller than the sum of its proper divisors (353306478).

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

218334930 is a wasteful number, since it uses less digits than its factorization.

218334930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661642.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 218334930 is about 14776.1608681010. The cubic root of 218334930 is about 602.1542284652.

The spelling of 218334930 in words is "two hundred eighteen million, three hundred thirty-four thousand, nine hundred thirty".