305798 has 4 divisors (see below), whose sum is σ = 458700. Its totient is φ = 152898.

The previous prime is 305783. The next prime is 305803. The reversal of 305798 is 897503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 897503 = 19 ⋅47237.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 305798.

It is an unprimeable number.

305798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76448 + ... + 76451.

It is an arithmetic number, because the mean of its divisors is an integer number (114675).

2³⁰⁵⁷⁹⁸ is an apocalyptic number.

305798 is a deficient number, since it is larger than the sum of its proper divisors (152902).

305798 is a wasteful number, since it uses less digits than its factorization.

305798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152901.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 305798 is about 552.9900541601. The cubic root of 305798 is about 67.3718097468.

The spelling of 305798 in words is "three hundred five thousand, seven hundred ninety-eight".