216489484 has 12 divisors (see below), whose sum is σ = 379034208. Its totient is φ = 108194000.

The previous prime is 216489463. The next prime is 216489487. The reversal of 216489484 is 484984612.

It is not an unprimeable number, because it can be changed into a prime (216489487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107 + ... + 20914.

It is an arithmetic number, because the mean of its divisors is an integer number (31586184).

Almost surely, 2^216489484 is an apocalyptic number.

It is an amenable number.

216489484 is a deficient number, since it is larger than the sum of its proper divisors (162544724).

216489484 is a wasteful number, since it uses less digits than its factorization.

216489484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25376 (or 25374 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 216489484 is about 14713.5816169959. The cubic root of 216489484 is about 600.4528840001.

The spelling of 216489484 in words is "two hundred sixteen million, four hundred eighty-nine thousand, four hundred eighty-four".