216828276 has 24 divisors (see below), whose sum is σ = 578208960. Its totient is φ = 61950912.

The previous prime is 216828263. The next prime is 216828277. The reversal of 216828276 is 672828612.

It is a happy number.

216828276 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 (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216828277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290561 + ... + 1290728.

It is an arithmetic number, because the mean of its divisors is an integer number (24092040).

Almost surely, 2^216828276 is an apocalyptic number.

It is an amenable number.

216828276 is an abundant number, since it is smaller than the sum of its proper divisors (361380684).

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

216828276 is a wasteful number, since it uses less digits than its factorization.

216828276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581303 (or 2581301 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 216828276 is about 14725.0900167028. The cubic root of 216828276 is about 600.7659440224.

The spelling of 216828276 in words is "two hundred sixteen million, eight hundred twenty-eight thousand, two hundred seventy-six".