305872 has 20 divisors (see below), whose sum is σ = 677536. Its totient is φ = 131040.

The previous prime is 305867. The next prime is 305873. The reversal of 305872 is 278503.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305873) by changing a digit.

305872 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 in 3 ways as a sum of consecutive naturals, for example, 1254 + ... + 1477.

2³⁰⁵⁸⁷² is an apocalyptic number.

It is an amenable number.

305872 is an abundant number, since it is smaller than the sum of its proper divisors (371664).

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

305872 is a wasteful number, since it uses less digits than its factorization.

305872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 305872 is about 553.0569590919. The cubic root of 305872 is about 67.3772437390.

The spelling of 305872 in words is "three hundred five thousand, eight hundred seventy-two".