308634389 has 6 divisors (see below), whose sum is σ = 359023734. Its totient is φ = 264543720.

The previous prime is 308634367. The next prime is 308634397. The reversal of 308634389 is 983436803.

It can be written as a sum of positive squares in only one way, i.e., 270602500 + 38031889 = 16450^2 + 6167^2 .

It is a de Polignac number, because none of the positive numbers 2^k-308634389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308636389) 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 5 ways as a sum of consecutive naturals, for example, 3149282 + ... + 3149379.

It is an arithmetic number, because the mean of its divisors is an integer number (59837289).

Almost surely, 2^308634389 is an apocalyptic number.

It is an amenable number.

308634389 is a deficient number, since it is larger than the sum of its proper divisors (50389345).

308634389 is an equidigital number, since it uses as much as digits as its factorization.

308634389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6298675 (or 6298668 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 308634389 is about 17567.9933117018. The cubic root of 308634389 is about 675.7946847096.

The spelling of 308634389 in words is "three hundred eight million, six hundred thirty-four thousand, three hundred eighty-nine".