305214729 has 32 divisors (see below), whose sum is σ = 425088000. Its totient is φ = 194685120.

The previous prime is 305214667. The next prime is 305214733. The reversal of 305214729 is 927412503.

It is not a de Polignac number, because 305214729 - 2¹¹ = 305212681 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 305214729.

It is not an unprimeable number, because it can be changed into a prime (305214799) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1872402 + ... + 1872564.

It is an arithmetic number, because the mean of its divisors is an integer number (13284000).

Almost surely, 2^305214729 is an apocalyptic number.

It is an amenable number.

305214729 is a deficient number, since it is larger than the sum of its proper divisors (119873271).

305214729 is a wasteful number, since it uses less digits than its factorization.

305214729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 305214729 is about 17470.3957883043. The cubic root of 305214729 is about 673.2894808276.

The spelling of 305214729 in words is "three hundred five million, two hundred fourteen thousand, seven hundred twenty-nine".