218026630 has 16 divisors (see below), whose sum is σ = 399853584. Its totient is φ = 85564960.

The previous prime is 218026621. The next prime is 218026631. The reversal of 218026630 is 36620812.

It is a super-2 number, since 2×218026630² = 95071222778313800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218026631) 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, 205156 + ... + 206215.

It is an arithmetic number, because the mean of its divisors is an integer number (24990849).

Almost surely, 2^218026630 is an apocalyptic number.

218026630 is a deficient number, since it is larger than the sum of its proper divisors (181826954).

218026630 is a wasteful number, since it uses less digits than its factorization.

218026630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411431.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 218026630 is about 14765.7248382868. The cubic root of 218026630 is about 601.8706708489.

The spelling of 218026630 in words is "two hundred eighteen million, twenty-six thousand, six hundred thirty".