216782076 has 72 divisors (see below), whose sum is σ = 608746320. Its totient is φ = 59797248.

The previous prime is 216782053. The next prime is 216782119. The reversal of 216782076 is 670287612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10696 + ... + 23408.

It is an arithmetic number, because the mean of its divisors is an integer number (8454810).

Almost surely, 2^216782076 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 216782076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304373160).

216782076 is an abundant number, since it is smaller than the sum of its proper divisors (391964244).

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

216782076 is a wasteful number, since it uses less digits than its factorization.

216782076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12763 (or 12754 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 216782076 is about 14723.5211821086. The cubic root of 216782076 is about 600.7232722229.

The spelling of 216782076 in words is "two hundred sixteen million, seven hundred eighty-two thousand, seventy-six".