218023308 has 18 divisors (see below), whose sum is σ = 551114564. Its totient is φ = 72674424.

The previous prime is 218023303. The next prime is 218023327. The reversal of 218023308 is 803320812.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (218023303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3028066 + ... + 3028137.

Almost surely, 2^218023308 is an apocalyptic number.

It is an amenable number.

218023308 is an abundant number, since it is smaller than the sum of its proper divisors (333091256).

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

218023308 is a wasteful number, since it uses less digits than its factorization.

218023308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056213 (or 6056208 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 218023308 is about 14765.6123476136. The cubic root of 218023308 is about 601.8676139983.

The spelling of 218023308 in words is "two hundred eighteen million, twenty-three thousand, three hundred eight".