217028834 has 16 divisors (see below), whose sum is σ = 376029216. Its totient is φ = 92846400.

The previous prime is 217028831. The next prime is 217028857. The reversal of 217028834 is 438820712.

217028834 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 217028794 and 217028803.

It is not an unprimeable number, because it can be changed into a prime (217028831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289772 + ... + 290519.

It is an arithmetic number, because the mean of its divisors is an integer number (23501826).

Almost surely, 2^217028834 is an apocalyptic number.

217028834 is a deficient number, since it is larger than the sum of its proper divisors (159000382).

217028834 is a wasteful number, since it uses less digits than its factorization.

217028834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580321.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 217028834 is about 14731.8985198786. The cubic root of 217028834 is about 600.9511155760.

The spelling of 217028834 in words is "two hundred seventeen million, twenty-eight thousand, eight hundred thirty-four".