216290284 has 24 divisors (see below), whose sum is σ = 433334048. Its totient is φ = 92534400.

The previous prime is 216290279. The next prime is 216290329. The reversal of 216290284 is 482092612.

216290284 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10402 + ... + 23254.

Almost surely, 2^216290284 is an apocalyptic number.

It is an amenable number.

216290284 is an abundant number, since it is smaller than the sum of its proper divisors (217043764).

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

216290284 is a wasteful number, since it uses less digits than its factorization.

216290284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13465 (or 13463 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 216290284 is about 14706.8108031619. The cubic root of 216290284 is about 600.2686611655.

The spelling of 216290284 in words is "two hundred sixteen million, two hundred ninety thousand, two hundred eighty-four".