216894190 has 32 divisors (see below), whose sum is σ = 412490880. Its totient is φ = 81978624.

The previous prime is 216894151. The next prime is 216894191. The reversal of 216894190 is 91498612.

It is a super-2 number, since 2×216894190² = 94086179311512200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216894191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5674 + ... + 21586.

It is an arithmetic number, because the mean of its divisors is an integer number (12890340).

Almost surely, 2^216894190 is an apocalyptic number.

216894190 is a deficient number, since it is larger than the sum of its proper divisors (195596690).

216894190 is a wasteful number, since it uses less digits than its factorization.

216894190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15996.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 216894190 is about 14727.3279993351. The cubic root of 216894190 is about 600.8268138119.

The spelling of 216894190 in words is "two hundred sixteen million, eight hundred ninety-four thousand, one hundred ninety".