218240808 has 32 divisors (see below), whose sum is σ = 547087200. Its totient is φ = 72548928.

The previous prime is 218240801. The next prime is 218240809. The reversal of 218240808 is 808042812.

It is not an unprimeable number, because it can be changed into a prime (218240801) 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, 3238 + ... + 21141.

It is an arithmetic number, because the mean of its divisors is an integer number (17096475).

Almost surely, 2^218240808 is an apocalyptic number.

It is an amenable number.

218240808 is an abundant number, since it is smaller than the sum of its proper divisors (328846392).

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

218240808 is a wasteful number, since it uses less digits than its factorization.

218240808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24761 (or 24757 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 218240808 is about 14772.9755973534. The cubic root of 218240808 is about 602.0676884776.

The spelling of 218240808 in words is "two hundred eighteen million, two hundred forty thousand, eight hundred eight".