218027830 has 16 divisors (see below), whose sum is σ = 400800960. Its totient is φ = 85355392.

The previous prime is 218027827. The next prime is 218027857. The reversal of 218027830 is 38720812.

It is a super-2 number, since 2×218027830² = 95072269309017800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218027792 and 218027801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231475 + ... + 232414.

It is an arithmetic number, because the mean of its divisors is an integer number (25050060).

Almost surely, 2^218027830 is an apocalyptic number.

218027830 is a deficient number, since it is larger than the sum of its proper divisors (182773130).

218027830 is a wasteful number, since it uses less digits than its factorization.

218027830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463943.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 218027830 is about 14765.7654728768. The cubic root of 218027830 is about 601.8717750618.

The spelling of 218027830 in words is "two hundred eighteen million, twenty-seven thousand, eight hundred thirty".