305238 has 8 divisors (see below), whose sum is σ = 610488. Its totient is φ = 101744.

The previous prime is 305237. The next prime is 305243. The reversal of 305238 is 832503.

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

305238 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305231) 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, 25431 + ... + 25442.

It is an arithmetic number, because the mean of its divisors is an integer number (76311).

2³⁰⁵²³⁸ is an apocalyptic number.

305238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

305238 is a wasteful number, since it uses less digits than its factorization.

305238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50878.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 305238 is about 552.4834839160. The cubic root of 305238 is about 67.3306591974.

The spelling of 305238 in words is "three hundred five thousand, two hundred thirty-eight".