305684 has 6 divisors (see below), whose sum is σ = 534954. Its totient is φ = 152840.

The previous prime is 305663. The next prime is 305717. The reversal of 305684 is 486503.

It can be written as a sum of positive squares in only one way, i.e., 183184 + 122500 = 428^2 + 350^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38207 + ... + 38214.

It is an arithmetic number, because the mean of its divisors is an integer number (89159).

2³⁰⁵⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

305684 is a deficient number, since it is larger than the sum of its proper divisors (229270).

305684 is a wasteful number, since it uses less digits than its factorization.

305684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76425 (or 76423 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 305684 is about 552.8869685569. The cubic root of 305684 is about 67.3634367458.

It can be divided in two parts, 305 and 684, that added together give a palindrome (989).

The spelling of 305684 in words is "three hundred five thousand, six hundred eighty-four".