305598 has 24 divisors (see below), whose sum is σ = 643464. Its totient is φ = 96720.

The previous prime is 305597. The next prime is 305603. The reversal of 305598 is 895503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305593) 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 11 ways as a sum of consecutive naturals, for example, 5740 + ... + 5792.

It is an arithmetic number, because the mean of its divisors is an integer number (26811).

2³⁰⁵⁵⁹⁸ is an apocalyptic number.

305598 is an abundant number, since it is smaller than the sum of its proper divisors (337866).

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

305598 is a wasteful number, since it uses less digits than its factorization.

305598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 305598 is about 552.8091895039. The cubic root of 305598 is about 67.3571188936.

It can be divided in two parts, 305 and 598, that added together give a triangular number (903 = T₄₂).

The spelling of 305598 in words is "three hundred five thousand, five hundred ninety-eight".