308047072 has 48 divisors (see below), whose sum is σ = 652739472. Its totient is φ = 142571520.

The previous prime is 308047043. The next prime is 308047081. The reversal of 308047072 is 270740803.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28543 + ... + 37825.

It is an arithmetic number, because the mean of its divisors is an integer number (13598739).

Almost surely, 2^308047072 is an apocalyptic number.

308047072 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 308047072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326369736).

308047072 is an abundant number, since it is smaller than the sum of its proper divisors (344692400).

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

308047072 is a wasteful number, since it uses less digits than its factorization.

308047072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9371 (or 9363 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 308047072 is about 17551.2698116119. The cubic root of 308047072 is about 675.3657438096.

Adding to 308047072 its reverse (270740803), we get a palindrome (578787875).

The spelling of 308047072 in words is "three hundred eight million, forty-seven thousand, seventy-two".