305740 has 12 divisors (see below), whose sum is σ = 642096. Its totient is φ = 122288.

The previous prime is 305719. The next prime is 305741. The reversal of 305740 is 47503.

It is not an unprimeable number, because it can be changed into a prime (305741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7624 + ... + 7663.

It is an arithmetic number, because the mean of its divisors is an integer number (53508).

2³⁰⁵⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

305740 is an abundant number, since it is smaller than the sum of its proper divisors (336356).

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

305740 is a wasteful number, since it uses less digits than its factorization.

305740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15296 (or 15294 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 305740 is about 552.9376095004. The cubic root of 305740 is about 67.3675500590.

The spelling of 305740 in words is "three hundred five thousand, seven hundred forty".