216166284 has 36 divisors (see below), whose sum is σ = 561191904. Its totient is φ = 70107552.

The previous prime is 216166273. The next prime is 216166297. The reversal of 216166284 is 482661612.

216166284 is a `hidden beast` number, since 2 + 16 + 16 + 628 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79812 + ... + 82475.

It is an arithmetic number, because the mean of its divisors is an integer number (15588664).

Almost surely, 2^216166284 is an apocalyptic number.

It is an amenable number.

216166284 is an abundant number, since it is smaller than the sum of its proper divisors (345025620).

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

216166284 is a wasteful number, since it uses less digits than its factorization.

216166284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162334 (or 162329 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 216166284 is about 14702.5944649235. The cubic root of 216166284 is about 600.1539271740.

The spelling of 216166284 in words is "two hundred sixteen million, one hundred sixty-six thousand, two hundred eighty-four".