216787798 has 8 divisors (see below), whose sum is σ = 327253392. Its totient is φ = 107703336.

The previous prime is 216787763. The next prime is 216787799. The reversal of 216787798 is 897787612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216787799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344890 + ... + 345517.

It is an arithmetic number, because the mean of its divisors is an integer number (40906674).

Almost surely, 2^216787798 is an apocalyptic number.

216787798 is a deficient number, since it is larger than the sum of its proper divisors (110465594).

216787798 is a wasteful number, since it uses less digits than its factorization.

216787798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690566.

The product of its digits is 2370816, while the sum is 55.

The square root of 216787798 is about 14723.7154957572. The cubic root of 216787798 is about 600.7285575743.

The spelling of 216787798 in words is "two hundred sixteen million, seven hundred eighty-seven thousand, seven hundred ninety-eight".