218252880 has 240 divisors, whose sum is σ = 774533760. Its totient is φ = 57106944.

The previous prime is 218252873. The next prime is 218252891. The reversal of 218252880 is 88252812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2002266 + ... + 2002374.

It is an arithmetic number, because the mean of its divisors is an integer number (3227224).

Almost surely, 2^218252880 is an apocalyptic number.

218252880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218252880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387266880).

218252880 is an abundant number, since it is smaller than the sum of its proper divisors (556280880).

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

218252880 is a wasteful number, since it uses less digits than its factorization.

218252880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 218252880 is about 14773.3841756045. The cubic root of 218252880 is about 602.0787894066.

The spelling of 218252880 in words is "two hundred eighteen million, two hundred fifty-two thousand, eight hundred eighty".