216338658 has 16 divisors (see below), whose sum is σ = 436085760. Its totient is φ = 71544816.

The previous prime is 216338641. The next prime is 216338659. The reversal of 216338658 is 856833612.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216338659) 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, 141193 + ... + 142716.

It is an arithmetic number, because the mean of its divisors is an integer number (27255360).

Almost surely, 2^216338658 is an apocalyptic number.

216338658 is an abundant number, since it is smaller than the sum of its proper divisors (219747102).

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

216338658 is a wasteful number, since it uses less digits than its factorization.

216338658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284041.

The product of its digits is 207360, while the sum is 42.

The square root of 216338658 is about 14708.4553233846. The cubic root of 216338658 is about 600.3134084856.

The spelling of 216338658 in words is "two hundred sixteen million, three hundred thirty-eight thousand, six hundred fifty-eight".