305056140 has 24 divisors (see below), whose sum is σ = 854157360. Its totient is φ = 81348288.

The previous prime is 305056139. The next prime is 305056187. The reversal of 305056140 is 41650503.

It is a self number, because there is not a number n which added to its sum of digits gives 305056140.

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 7 ways as a sum of consecutive naturals, for example, 2542075 + ... + 2542194.

It is an arithmetic number, because the mean of its divisors is an integer number (35589890).

Almost surely, 2^305056140 is an apocalyptic number.

305056140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

305056140 is an abundant number, since it is smaller than the sum of its proper divisors (549101220).

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

305056140 is a wasteful number, since it uses less digits than its factorization.

305056140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084281 (or 5084279 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 305056140 is about 17465.8564061428. The cubic root of 305056140 is about 673.1728473078.

The spelling of 305056140 in words is "three hundred five million, fifty-six thousand, one hundred forty".