9664218 has 32 divisors (see below), whose sum is σ = 21611520. Its totient is φ = 3201120.

The previous prime is 9664183. The next prime is 9664223. The reversal of 9664218 is 8124669.

9664218 is a `hidden beast` number, since 9 + 6 + 642 + 1 + 8 = 666.

It is a Curzon number.

It is a zygodrome in base 5.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9846 + ... + 10782.

It is an arithmetic number, because the mean of its divisors is an integer number (675360).

Almost surely, 2^9664218 is an apocalyptic number.

9664218 is an abundant number, since it is smaller than the sum of its proper divisors (11947302).

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

9664218 is a wasteful number, since it uses less digits than its factorization.

9664218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 1133 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 9664218 is about 3108.7325391548. The cubic root of 9664218 is about 213.0045624891.

It can be divided in two parts, 966 and 4218, that added together give a square (5184 = 72²).

The spelling of 9664218 in words is "nine million, six hundred sixty-four thousand, two hundred eighteen".