305420865 has 16 divisors (see below), whose sum is σ = 488925888. Its totient is φ = 162806976.

The previous prime is 305420851. The next prime is 305420881. The reversal of 305420865 is 568024503.

It is not a de Polignac number, because 305420865 - 2¹³ = 305412673 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34374 + ... + 42336.

It is an arithmetic number, because the mean of its divisors is an integer number (30557868).

Almost surely, 2^305420865 is an apocalyptic number.

It is an amenable number.

305420865 is a deficient number, since it is larger than the sum of its proper divisors (183505023).

305420865 is a wasteful number, since it uses less digits than its factorization.

305420865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10528.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 305420865 is about 17476.2943726638. The cubic root of 305420865 is about 673.4410221893.

The spelling of 305420865 in words is "three hundred five million, four hundred twenty thousand, eight hundred sixty-five".