308289345 has 64 divisors (see below), whose sum is σ = 639098880. Its totient is φ = 123234048.

The previous prime is 308289341. The next prime is 308289361. The reversal of 308289345 is 543982803.

It is not a de Polignac number, because 308289345 - 2² = 308289341 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 308289297 and 308289306.

It is not an unprimeable number, because it can be changed into a prime (308289341) 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 63 ways as a sum of consecutive naturals, for example, 19992 + ... + 31878.

It is an arithmetic number, because the mean of its divisors is an integer number (9985920).

Almost surely, 2^308289345 is an apocalyptic number.

308289345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

308289345 is an abundant number, since it is smaller than the sum of its proper divisors (330809535).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

308289345 is a wasteful number, since it uses less digits than its factorization.

308289345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11934.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 308289345 is about 17558.1703203950. The cubic root of 308289345 is about 675.5427513982.

The spelling of 308289345 in words is "three hundred eight million, two hundred eighty-nine thousand, three hundred forty-five".