318280640 has 56 divisors (see below), whose sum is σ = 759482352. Its totient is φ = 127047680.

The previous prime is 318280639. The next prime is 318280667. The reversal of 318280640 is 46082813.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 318280597 and 318280606.

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, 242867 + ... + 244173.

Almost surely, 2^318280640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318280640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379741176).

318280640 is an abundant number, since it is smaller than the sum of its proper divisors (441201712).

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

318280640 is a wasteful number, since it uses less digits than its factorization.

318280640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2075 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 318280640 is about 17840.4215196839. The cubic root of 318280640 is about 682.7631513068.

The spelling of 318280640 in words is "three hundred eighteen million, two hundred eighty thousand, six hundred forty".