216678792 has 32 divisors (see below), whose sum is σ = 590942880. Its totient is φ = 65660160.

The previous prime is 216678779. The next prime is 216678799. The reversal of 216678792 is 297876612.

It is not an unprimeable number, because it can be changed into a prime (216678799) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 410113 + ... + 410640.

It is an arithmetic number, because the mean of its divisors is an integer number (18466965).

Almost surely, 2^216678792 is an apocalyptic number.

216678792 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216678792 is an abundant number, since it is smaller than the sum of its proper divisors (374264088).

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

216678792 is a wasteful number, since it uses less digits than its factorization.

216678792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820773 (or 820769 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 216678792 is about 14720.0133152114. The cubic root of 216678792 is about 600.6278538811.

It can be divided in two parts, 216678 and 792, that added together give a triangular number (217470 = T₆₅₉).

The spelling of 216678792 in words is "two hundred sixteen million, six hundred seventy-eight thousand, seven hundred ninety-two".