218870532 has 48 divisors (see below), whose sum is σ = 570969280. Its totient is φ = 72503424.

The previous prime is 218870513. The next prime is 218870539. The reversal of 218870532 is 235078812.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (218870539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11388 + ... + 23820.

Almost surely, 2^218870532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218870532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285484640).

218870532 is an abundant number, since it is smaller than the sum of its proper divisors (352098748).

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

218870532 is a wasteful number, since it uses less digits than its factorization.

218870532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12609 (or 12601 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 218870532 is about 14794.2736219120. The cubic root of 218870532 is about 602.6462121117.

The spelling of 218870532 in words is "two hundred eighteen million, eight hundred seventy thousand, five hundred thirty-two".