305286085729 has 3 divisors (see below), whose sum is σ = 305286638257. Its totient is φ = 305285533202.

The previous prime is 305286085711. The next prime is 305286085733. The reversal of 305286085729 is 927580682503.

The square root of 305286085729 is 552527.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 305286085729 - 2¹⁵ = 305286052961 is a prime.

It is a super-2 number, since 2×305286085729² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 305286085729.

It is not an unprimeable number, because it can be changed into a prime (305286085229) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 276264 + ... + 828790.

Almost surely, 2^305286085729 is an apocalyptic number.

305286085729 is the 552527-th square number.

305286085729 is the 276264-th centered octagonal number.

It is an amenable number.

305286085729 is a deficient number, since it is larger than the sum of its proper divisors (552528).

305286085729 is an frugal number, since it uses more digits than its factorization.

305286085729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105054 (or 552527 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 305286085729 in words is "three hundred five billion, two hundred eighty-six million, eighty-five thousand, seven hundred twenty-nine".