216889530 has 96 divisors (see below), whose sum is σ = 615055680. Its totient is φ = 48522240.

The previous prime is 216889513. The next prime is 216889531. The reversal of 216889530 is 35988612.

It is not an unprimeable number, because it can be changed into a prime (216889531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53826 + ... + 57714.

It is an arithmetic number, because the mean of its divisors is an integer number (6406830).

Almost surely, 2^216889530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216889530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307527840).

216889530 is an abundant number, since it is smaller than the sum of its proper divisors (398166150).

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

216889530 is a wasteful number, since it uses less digits than its factorization.

216889530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936 (or 3923 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 216889530 is about 14727.1697892025. The cubic root of 216889530 is about 600.8225108335.

The spelling of 216889530 in words is "two hundred sixteen million, eight hundred eighty-nine thousand, five hundred thirty".