305860 has 24 divisors (see below), whose sum is σ = 659736. Its totient is φ = 119040.

The previous prime is 305857. The next prime is 305861. The reversal of 305860 is 68503.

It can be written as a sum of positive squares in 4 ways, for example, as 1156 + 304704 = 34^2 + 552^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634 + ... + 1006.

It is an arithmetic number, because the mean of its divisors is an integer number (27489).

2³⁰⁵⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329868).

305860 is an abundant number, since it is smaller than the sum of its proper divisors (353876).

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

305860 is a wasteful number, since it uses less digits than its factorization.

305860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 305860 is about 553.0461101934. The cubic root of 305860 is about 67.3763626106.

The spelling of 305860 in words is "three hundred five thousand, eight hundred sixty".