343440216 has 192 divisors, whose sum is σ = 1141048800. Its totient is φ = 95364864.

The previous prime is 343440203. The next prime is 343440217. The reversal of 343440216 is 612044343.

343440216 is a `hidden beast` number, since 3 + 4 + 3 + 440 + 216 = 666.

It is a super-2 number, since 2×343440216² = 235902363932253312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 343440216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343440217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 391170 + ... + 392046.

Almost surely, 2^343440216 is an apocalyptic number.

343440216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 343440216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (570524400).

343440216 is an abundant number, since it is smaller than the sum of its proper divisors (797608584).

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

343440216 is a wasteful number, since it uses less digits than its factorization.

343440216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 343440216 is about 18532.1400814909. The cubic root of 343440216 is about 700.2993386432.

Adding to 343440216 its reverse (612044343), we get a palindrome (955484559).

The spelling of 343440216 in words is "three hundred forty-three million, four hundred forty thousand, two hundred sixteen".