305144 has 16 divisors (see below), whose sum is σ = 654000. Its totient is φ = 130752.

The previous prime is 305143. The next prime is 305147. The reversal of 305144 is 441503.

It is a super-2 number, since 2×305144² = 186225721472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2669 + ... + 2780.

It is an arithmetic number, because the mean of its divisors is an integer number (40875).

2³⁰⁵¹⁴⁴ is an apocalyptic number.

It is an amenable number.

305144 is an abundant number, since it is smaller than the sum of its proper divisors (348856).

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

305144 is a wasteful number, since it uses less digits than its factorization.

305144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462 (or 5458 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 305144 is about 552.3984069492. The cubic root of 305144 is about 67.3237468516.

Adding to 305144 its reverse (441503), we get a palindrome (746647).

The spelling of 305144 in words is "three hundred five thousand, one hundred forty-four".