216798879 has 16 divisors (see below), whose sum is σ = 315987840. Its totient is φ = 131124960.

The previous prime is 216798859. The next prime is 216798917. The reversal of 216798879 is 978897612.

It is not a de Polignac number, because 216798879 - 2⁹ = 216798367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216798839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10344 + ... + 23250.

It is an arithmetic number, because the mean of its divisors is an integer number (19749240).

Almost surely, 2^216798879 is an apocalyptic number.

216798879 is a deficient number, since it is larger than the sum of its proper divisors (99188961).

216798879 is a wasteful number, since it uses less digits than its factorization.

216798879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13430.

The product of its digits is 3048192, while the sum is 57.

The square root of 216798879 is about 14724.0917886300. The cubic root of 216798879 is about 600.7387927133.

The spelling of 216798879 in words is "two hundred sixteen million, seven hundred ninety-eight thousand, eight hundred seventy-nine".