216818960 has 40 divisors (see below), whose sum is σ = 520371456. Its totient is φ = 83928960.

The previous prime is 216818933. The next prime is 216818963. The reversal of 216818960 is 69818612.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×216818960² = 94020922830963200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216818963) 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, 41234 + ... + 46193.

Almost surely, 2^216818960 is an apocalyptic number.

216818960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216818960 is an abundant number, since it is smaller than the sum of its proper divisors (303552496).

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

216818960 is a wasteful number, since it uses less digits than its factorization.

216818960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87471 (or 87465 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 216818960 is about 14724.7736824713. The cubic root of 216818960 is about 600.7573399544.

The spelling of 216818960 in words is "two hundred sixteen million, eight hundred eighteen thousand, nine hundred sixty".