305326140 has 96 divisors (see below), whose sum is σ = 980313600. Its totient is φ = 69555456.

The previous prime is 305326117. The next prime is 305326157. The reversal of 305326140 is 41623503.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 305326140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145539 + ... + 147621.

It is an arithmetic number, because the mean of its divisors is an integer number (10211600).

Almost surely, 2^305326140 is an apocalyptic number.

305326140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305326140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490156800).

305326140 is an abundant number, since it is smaller than the sum of its proper divisors (674987460).

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

305326140 is a wasteful number, since it uses less digits than its factorization.

305326140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451 (or 2449 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 305326140 is about 17473.5840628075. The cubic root of 305326140 is about 673.3713933545.

Adding to 305326140 its reverse (41623503), we get a palindrome (346949643).

The spelling of 305326140 in words is "three hundred five million, three hundred twenty-six thousand, one hundred forty".