216438698 has 16 divisors (see below), whose sum is σ = 371257344. Its totient is φ = 92704560.

The previous prime is 216438661. The next prime is 216438701. The reversal of 216438698 is 896834612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27863 + ... + 34773.

It is an arithmetic number, because the mean of its divisors is an integer number (23203584).

Almost surely, 2^216438698 is an apocalyptic number.

216438698 is a deficient number, since it is larger than the sum of its proper divisors (154818646).

216438698 is a wasteful number, since it uses less digits than its factorization.

216438698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9157.

The product of its digits is 497664, while the sum is 47.

The square root of 216438698 is about 14711.8556953227. The cubic root of 216438698 is about 600.4059271618.

The spelling of 216438698 in words is "two hundred sixteen million, four hundred thirty-eight thousand, six hundred ninety-eight".