218238704 has 10 divisors (see below), whose sum is σ = 422837520. Its totient is φ = 109119344.

The previous prime is 218238703. The next prime is 218238733. The reversal of 218238704 is 407832812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218238703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6819944 + ... + 6819975.

It is an arithmetic number, because the mean of its divisors is an integer number (42283752).

Almost surely, 2^218238704 is an apocalyptic number.

It is an amenable number.

218238704 is a deficient number, since it is larger than the sum of its proper divisors (204598816).

218238704 is a wasteful number, since it uses less digits than its factorization.

218238704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13639927 (or 13639921 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 218238704 is about 14772.9043860711. The cubic root of 218238704 is about 602.0657536813.

The spelling of 218238704 in words is "two hundred eighteen million, two hundred thirty-eight thousand, seven hundred four".