216488 has 8 divisors (see below), whose sum is σ = 405930. Its totient is φ = 108240.

The previous prime is 216481. The next prime is 216493. The reversal of 216488 is 884612.

216488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 6724 = 458^2 + 82^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 216488.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216488.

It is not an unprimeable number, because it can be changed into a prime (216481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13523 + ... + 13538.

2²¹⁶⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

216488 is a deficient number, since it is larger than the sum of its proper divisors (189442).

216488 is a wasteful number, since it uses less digits than its factorization.

216488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27067 (or 27063 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 216488 is about 465.2827097583. The cubic root of 216488 is about 60.0451511995.

The spelling of 216488 in words is "two hundred sixteen thousand, four hundred eighty-eight".