216368340 has 48 divisors (see below), whose sum is σ = 616109760. Its totient is φ = 56719360.

The previous prime is 216368329. The next prime is 216368359. The reversal of 216368340 is 43863612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27021 + ... + 34100.

It is an arithmetic number, because the mean of its divisors is an integer number (12835620).

Almost surely, 2^216368340 is an apocalyptic number.

216368340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216368340 is an abundant number, since it is smaller than the sum of its proper divisors (399741420).

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

216368340 is a wasteful number, since it uses less digits than its factorization.

216368340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61192 (or 61190 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 216368340 is about 14709.4643002388. The cubic root of 216368340 is about 600.3408618742.

The spelling of 216368340 in words is "two hundred sixteen million, three hundred sixty-eight thousand, three hundred forty".