216462646 has 8 divisors (see below), whose sum is σ = 335168064. Its totient is φ = 104739960.

The previous prime is 216462643. The next prime is 216462721. The reversal of 216462646 is 646264612.

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

It is a super-2 number, since 2×216462646² = 93712154226642632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216462643) 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 3 ways as a sum of consecutive naturals, for example, 1745605 + ... + 1745728.

It is an arithmetic number, because the mean of its divisors is an integer number (41896008).

Almost surely, 2^216462646 is an apocalyptic number.

216462646 is a deficient number, since it is larger than the sum of its proper divisors (118705418).

216462646 is a wasteful number, since it uses less digits than its factorization.

216462646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491366.

The product of its digits is 82944, while the sum is 37.

The square root of 216462646 is about 14712.6695742139. The cubic root of 216462646 is about 600.4280704461.

The spelling of 216462646 in words is "two hundred sixteen million, four hundred sixty-two thousand, six hundred forty-six".