216782496 has 144 divisors (see below), whose sum is σ = 708873984. Its totient is φ = 61558272.

The previous prime is 216782491. The next prime is 216782507. The reversal of 216782496 is 694287612.

It is a happy number.

216782496 is a `hidden beast` number, since 21 + 67 + 82 + 496 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (290304) is a multiple of the sum of its prime divisors (672).

It is not an unprimeable number, because it can be changed into a prime (216782491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 590505 + ... + 590871.

It is an arithmetic number, because the mean of its divisors is an integer number (4922736).

Almost surely, 2^216782496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216782496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354436992).

216782496 is an abundant number, since it is smaller than the sum of its proper divisors (492091488).

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

216782496 is a wasteful number, since it uses less digits than its factorization.

216782496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 672 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 216782496 is about 14723.5354449942. The cubic root of 216782496 is about 600.7236601757.

The spelling of 216782496 in words is "two hundred sixteen million, seven hundred eighty-two thousand, four hundred ninety-six".