305712066 has 32 divisors (see below), whose sum is σ = 672538176. Its totient is φ = 92637600.

The previous prime is 305712061. The next prime is 305712103. The reversal of 305712066 is 660217503.

It is not an unprimeable number, because it can be changed into a prime (305712061) 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, 11155 + ... + 27126.

It is an arithmetic number, because the mean of its divisors is an integer number (21016818).

Almost surely, 2^305712066 is an apocalyptic number.

305712066 is an abundant number, since it is smaller than the sum of its proper divisors (366826110).

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

305712066 is a wasteful number, since it uses less digits than its factorization.

305712066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38319 (or 38297 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 305712066 is about 17484.6237019846. The cubic root of 305712066 is about 673.6549831299.

Adding to 305712066 its reverse (660217503), we get a palindrome (965929569).

The spelling of 305712066 in words is "three hundred five million, seven hundred twelve thousand, sixty-six".