305132140 has 24 divisors (see below), whose sum is σ = 643537440. Its totient is φ = 121527168.

The previous prime is 305132123. The next prime is 305132159. The reversal of 305132140 is 41231503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28080 + ... + 37399.

It is an arithmetic number, because the mean of its divisors is an integer number (26814060).

Almost surely, 2^305132140 is an apocalyptic number.

It is an amenable number.

305132140 is an abundant number, since it is smaller than the sum of its proper divisors (338405300).

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

305132140 is a wasteful number, since it uses less digits than its factorization.

305132140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65721 (or 65719 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 305132140 is about 17468.0319440972. The cubic root of 305132140 is about 673.2287461863.

Adding to 305132140 its reverse (41231503), we get a palindrome (346363643).

The spelling of 305132140 in words is "three hundred five million, one hundred thirty-two thousand, one hundred forty".