218935190 has 16 divisors (see below), whose sum is σ = 394299792. Its totient is φ = 87525984.

The previous prime is 218935177. The next prime is 218935193. The reversal of 218935190 is 91539812.

It is a super-2 number, since 2×218935190² = 95865234840672200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218935193) 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, 17477 + ... + 27263.

It is an arithmetic number, because the mean of its divisors is an integer number (24643737).

Almost surely, 2^218935190 is an apocalyptic number.

218935190 is a deficient number, since it is larger than the sum of its proper divisors (175364602).

218935190 is a wasteful number, since it uses less digits than its factorization.

218935190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12031.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 218935190 is about 14796.4586979453. The cubic root of 218935190 is about 602.7055501780.

The spelling of 218935190 in words is "two hundred eighteen million, nine hundred thirty-five thousand, one hundred ninety".