305398 has 8 divisors (see below), whose sum is σ = 470592. Its totient is φ = 148536.

The previous prime is 305377. The next prime is 305401. The reversal of 305398 is 893503.

It is a happy number.

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

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (58824).

2³⁰⁵³⁹⁸ is an apocalyptic number.

305398 is a deficient number, since it is larger than the sum of its proper divisors (165194).

305398 is a wasteful number, since it uses less digits than its factorization.

305398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 305398 is about 552.6282656542. The cubic root of 305398 is about 67.3424216294.

It can be divided in two parts, 305 and 398, that added together give a triangular number (703 = T₃₇).

The spelling of 305398 in words is "three hundred five thousand, three hundred ninety-eight".