216078 has 8 divisors (see below), whose sum is σ = 432168. Its totient is φ = 72024.

The previous prime is 216071. The next prime is 216091. The reversal of 216078 is 870612.

It is a sphenic number, since it is the product of 3 distinct primes.

216078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18001 + ... + 18012.

It is an arithmetic number, because the mean of its divisors is an integer number (54021).

216078 is a Friedman number, since it can be written as 78+60^(2+1), using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁷⁸ is an apocalyptic number.

216078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216078 is a wasteful number, since it uses less digits than its factorization.

216078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36018.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 216078 is about 464.8419086098. The cubic root of 216078 is about 60.0072213531.

The spelling of 216078 in words is "two hundred sixteen thousand, seventy-eight".