305212089 has 16 divisors (see below), whose sum is σ = 500861312. Its totient is φ = 160990848.

The previous prime is 305212069. The next prime is 305212091. The reversal of 305212089 is 980212503.

It is a happy number.

It is not a de Polignac number, because 305212089 - 2⁵ = 305212057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (305212009) 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, 558724 + ... + 559269.

It is an arithmetic number, because the mean of its divisors is an integer number (31303832).

Almost surely, 2^305212089 is an apocalyptic number.

305212089 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

305212089 is a deficient number, since it is larger than the sum of its proper divisors (195649223).

305212089 is a wasteful number, since it uses less digits than its factorization.

305212089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118016.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 305212089 is about 17470.3202317531. The cubic root of 305212089 is about 673.2875395830.

The spelling of 305212089 in words is "three hundred five million, two hundred twelve thousand, eighty-nine".