216840076 has 36 divisors (see below), whose sum is σ = 398841352. Its totient is φ = 103130496.

The previous prime is 216840061. The next prime is 216840121. The reversal of 216840076 is 670048612.

216840076 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245131 + ... + 246013.

Almost surely, 2^216840076 is an apocalyptic number.

It is an amenable number.

216840076 is a deficient number, since it is larger than the sum of its proper divisors (182001276).

216840076 is a wasteful number, since it uses less digits than its factorization.

216840076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 216840076 is about 14725.4906879194. The cubic root of 216840076 is about 600.7768419085.

Adding to 216840076 its reverse (670048612), we get a palindrome (886888688).

The spelling of 216840076 in words is "two hundred sixteen million, eight hundred forty thousand, seventy-six".