216288984 has 32 divisors (see below), whose sum is σ = 558167040. Its totient is φ = 69770400.

The previous prime is 216288983. The next prime is 216289037. The reversal of 216288984 is 489882612.

216288984 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216288983) 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, 144612 + ... + 146099.

It is an arithmetic number, because the mean of its divisors is an integer number (17442720).

Almost surely, 2^216288984 is an apocalyptic number.

216288984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216288984 is an abundant number, since it is smaller than the sum of its proper divisors (341878056).

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

216288984 is a wasteful number, since it uses less digits than its factorization.

216288984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290751 (or 290747 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 216288984 is about 14706.7666058859. The cubic root of 216288984 is about 600.2674585366.

The spelling of 216288984 in words is "two hundred sixteen million, two hundred eighty-eight thousand, nine hundred eighty-four".