318481648 has 40 divisors (see below), whose sum is σ = 655672320. Its totient is φ = 149434560.

The previous prime is 318481643. The next prime is 318481651. The reversal of 318481648 is 846184813.

It is a super-2 number, since 2×318481648² = 202861120225591808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318481643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27633 + ... + 37423.

It is an arithmetic number, because the mean of its divisors is an integer number (16391808).

Almost surely, 2^318481648 is an apocalyptic number.

318481648 is a gapful number since it is divisible by the number (38) 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 318481648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327836160).

318481648 is an abundant number, since it is smaller than the sum of its proper divisors (337190672).

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

318481648 is a wasteful number, since it uses less digits than its factorization.

318481648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9925 (or 9919 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 318481648 is about 17846.0541296949. The cubic root of 318481648 is about 682.9068525537.

The spelling of 318481648 in words is "three hundred eighteen million, four hundred eighty-one thousand, six hundred forty-eight".