216926228 has 12 divisors (see below), whose sum is σ = 388449600. Its totient is φ = 105940632.

The previous prime is 216926209. The next prime is 216926231. The reversal of 216926228 is 822629612.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 216926191 and 216926200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630428 + ... + 630771.

It is an arithmetic number, because the mean of its divisors is an integer number (32370800).

Almost surely, 2^216926228 is an apocalyptic number.

It is an amenable number.

216926228 is a deficient number, since it is larger than the sum of its proper divisors (171523372).

216926228 is a wasteful number, since it uses less digits than its factorization.

216926228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261246 (or 1261244 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 216926228 is about 14728.4156649655. The cubic root of 216926228 is about 600.8563955813.

The spelling of 216926228 in words is "two hundred sixteen million, nine hundred twenty-six thousand, two hundred twenty-eight".