308218 has 8 divisors (see below), whose sum is σ = 486720. Its totient is φ = 145980.

The previous prime is 308213. The next prime is 308219. The reversal of 308218 is 812803.

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

It is not an unprimeable number, because it can be changed into a prime (308213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4018 + ... + 4093.

It is an arithmetic number, because the mean of its divisors is an integer number (60840).

2³⁰⁸²¹⁸ is an apocalyptic number.

308218 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

308218 is a deficient number, since it is larger than the sum of its proper divisors (178502).

308218 is a wasteful number, since it uses less digits than its factorization.

308218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8132.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 308218 is about 555.1738466463. The cubic root of 308218 is about 67.5490635513.

The spelling of 308218 in words is "three hundred eight thousand, two hundred eighteen".