216829838 has 8 divisors (see below), whose sum is σ = 330757560. Its totient is φ = 106577320.

The previous prime is 216829831. The next prime is 216829867. The reversal of 216829838 is 838928612.

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

It is a junction number, because it is equal to n+sod(n) for n = 216829792 and 216829801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216829831) 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, 918653 + ... + 918888.

It is an arithmetic number, because the mean of its divisors is an integer number (41344695).

Almost surely, 2^216829838 is an apocalyptic number.

216829838 is a deficient number, since it is larger than the sum of its proper divisors (113927722).

216829838 is a wasteful number, since it uses less digits than its factorization.

216829838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837602.

The product of its digits is 331776, while the sum is 47.

The square root of 216829838 is about 14725.1430553323. The cubic root of 216829838 is about 600.7673866297.

The spelling of 216829838 in words is "two hundred sixteen million, eight hundred twenty-nine thousand, eight hundred thirty-eight".