305434530 has 32 divisors (see below), whose sum is σ = 814492800. Its totient is φ = 81449136.

The previous prime is 305434499. The next prime is 305434531. The reversal of 305434530 is 35434503.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 305434494 and 305434503.

It is not an unprimeable number, because it can be changed into a prime (305434531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 565350 + ... + 565889.

It is an arithmetic number, because the mean of its divisors is an integer number (25452900).

Almost surely, 2^305434530 is an apocalyptic number.

305434530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

305434530 is an abundant number, since it is smaller than the sum of its proper divisors (509058270).

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

305434530 is a wasteful number, since it uses less digits than its factorization.

305434530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131255 (or 1131249 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 27.

The square root of 305434530 is about 17476.6853264571. The cubic root of 305434530 is about 673.4510656358.

Subtracting from 305434530 its sum of digits (27), we obtain a palindrome (305434503).

The spelling of 305434530 in words is "three hundred five million, four hundred thirty-four thousand, five hundred thirty".