218730620 has 12 divisors (see below), whose sum is σ = 459334344. Its totient is φ = 87492240.

The previous prime is 218730607. The next prime is 218730671. The reversal of 218730620 is 26037812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5468246 + ... + 5468285.

It is an arithmetic number, because the mean of its divisors is an integer number (38277862).

Almost surely, 2^218730620 is an apocalyptic number.

218730620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218730620 is an abundant number, since it is smaller than the sum of its proper divisors (240603724).

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

218730620 is a wasteful number, since it uses less digits than its factorization.

218730620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10936540 (or 10936538 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 218730620 is about 14789.5442796592. The cubic root of 218730620 is about 602.5177717823.

The spelling of 218730620 in words is "two hundred eighteen million, seven hundred thirty thousand, six hundred twenty".