216780888 has 64 divisors (see below), whose sum is σ = 578730240. Its totient is φ = 67503744.

The previous prime is 216780877. The next prime is 216780901. The reversal of 216780888 is 888087612.

216780888 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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19170 + ... + 28302.

It is an arithmetic number, because the mean of its divisors is an integer number (9042660).

Almost surely, 2^216780888 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 216780888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289365120).

216780888 is an abundant number, since it is smaller than the sum of its proper divisors (361949352).

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

216780888 is a wasteful number, since it uses less digits than its factorization.

216780888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9208 (or 9204 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The square root of 216780888 is about 14723.4808384431. The cubic root of 216780888 is about 600.7221748681.

The spelling of 216780888 in words is "two hundred sixteen million, seven hundred eighty thousand, eight hundred eighty-eight".