305305057 has 8 divisors (see below), whose sum is σ = 323416800. Its totient is φ = 287210304.

The previous prime is 305305051. The next prime is 305305067. The reversal of 305305057 is 750503503.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 305305057 - 2⁷ = 305304929 is a prime.

It is a super-2 number, since 2×305305057² = 186422355659546498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305305051) 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 7 ways as a sum of consecutive naturals, for example, 68194 + ... + 72532.

It is an arithmetic number, because the mean of its divisors is an integer number (40427100).

Almost surely, 2^305305057 is an apocalyptic number.

It is an amenable number.

305305057 is a deficient number, since it is larger than the sum of its proper divisors (18111743).

305305057 is a wasteful number, since it uses less digits than its factorization.

305305057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8495.

The product of its (nonzero) digits is 7875, while the sum is 28.

The square root of 305305057 is about 17472.9807703208. The cubic root of 305305057 is about 673.3558940638.

The spelling of 305305057 in words is "three hundred five million, three hundred five thousand, fifty-seven".