216888704 has 16 divisors (see below), whose sum is σ = 432083220. Its totient is φ = 108444288.

The previous prime is 216888677. The next prime is 216888761. The reversal of 216888704 is 407888612.

216888704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 847094 + ... + 847349.

Almost surely, 2^216888704 is an apocalyptic number.

It is an amenable number.

216888704 is a deficient number, since it is larger than the sum of its proper divisors (215194516).

216888704 is an equidigital number, since it uses as much as digits as its factorization.

216888704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694457 (or 1694445 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 216888704 is about 14727.1417457700. The cubic root of 216888704 is about 600.8217481103.

The spelling of 216888704 in words is "two hundred sixteen million, eight hundred eighty-eight thousand, seven hundred four".