217796338 has 8 divisors (see below), whose sum is σ = 340898688. Its totient is φ = 104163444.

The previous prime is 217796311. The next prime is 217796339. The reversal of 217796338 is 833697712.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 4734703 = 217796338 / (2 + 1 + 7 + 7 + 9 + 6 + 3 + 3 + 8).

It is not an unprimeable number, because it can be changed into a prime (217796339) 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, 2367306 + ... + 2367397.

It is an arithmetic number, because the mean of its divisors is an integer number (42612336).

Almost surely, 2^217796338 is an apocalyptic number.

217796338 is a deficient number, since it is larger than the sum of its proper divisors (123102350).

217796338 is a wasteful number, since it uses less digits than its factorization.

217796338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734728.

The product of its digits is 381024, while the sum is 46.

The square root of 217796338 is about 14757.9245830842. The cubic root of 217796338 is about 601.6586863001.

The spelling of 217796338 in words is "two hundred seventeen million, seven hundred ninety-six thousand, three hundred thirty-eight".