305005530 has 48 divisors (see below), whose sum is σ = 765263520. Its totient is φ = 77794464.

The previous prime is 305005529. The next prime is 305005567. The reversal of 305005530 is 35500503.

It is a junction number, because it is equal to n+sod(n) for n = 305005497 and 305005506.

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 23 ways as a sum of consecutive naturals, for example, 6261 + ... + 25479.

It is an arithmetic number, because the mean of its divisors is an integer number (15942990).

Almost surely, 2^305005530 is an apocalyptic number.

305005530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 305005530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382631760).

305005530 is an abundant number, since it is smaller than the sum of its proper divisors (460257990).

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

305005530 is a wasteful number, since it uses less digits than its factorization.

305005530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19275 (or 19252 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 21.

The square root of 305005530 is about 17464.4075192948. The cubic root of 305005530 is about 673.1356179178.

The spelling of 305005530 in words is "three hundred five million, five thousand, five hundred thirty".