216804006 has 16 divisors (see below), whose sum is σ = 481786800. Its totient is φ = 72267984.

The previous prime is 216803959. The next prime is 216804017. The reversal of 216804006 is 600408612.

216804006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2007391 + ... + 2007498.

It is an arithmetic number, because the mean of its divisors is an integer number (30111675).

Almost surely, 2^216804006 is an apocalyptic number.

216804006 is an abundant number, since it is smaller than the sum of its proper divisors (264982794).

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

216804006 is a wasteful number, since it uses less digits than its factorization.

216804006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014900 (or 4014894 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 216804006 is about 14724.2658900198. The cubic root of 216804006 is about 600.7435282290.

The spelling of 216804006 in words is "two hundred sixteen million, eight hundred four thousand, six".