308243712 has 108 divisors (see below), whose sum is σ = 954433536. Its totient is φ = 88058880.

The previous prime is 308243693. The next prime is 308243713. The reversal of 308243712 is 217342803.

It is a self number, because there is not a number n which added to its sum of digits gives 308243712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308243713) 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 11 ways as a sum of consecutive naturals, for example, 33537 + ... + 41727.

Almost surely, 2^308243712 is an apocalyptic number.

308243712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308243712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477216768).

308243712 is an abundant number, since it is smaller than the sum of its proper divisors (646189824).

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

308243712 is an equidigital number, since it uses as much as digits as its factorization.

308243712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8224 (or 8203 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 308243712 is about 17556.8707918011. The cubic root of 308243712 is about 675.5094184660.

Subtracting from 308243712 its reverse (217342803), we obtain a palindrome (90900909).

The spelling of 308243712 in words is "three hundred eight million, two hundred forty-three thousand, seven hundred twelve".