318850640 has 80 divisors (see below), whose sum is σ = 793355472. Its totient is φ = 118751232.

The previous prime is 318850627. The next prime is 318850663. The reversal of 318850640 is 46058813.

It can be written as a sum of positive squares in 8 ways, for example, as 40094224 + 278756416 = 6332^2 + 16696^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 318850640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130712 + ... + 133128.

Almost surely, 2^318850640 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 318850640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396677736).

318850640 is an abundant number, since it is smaller than the sum of its proper divisors (474504832).

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

318850640 is a wasteful number, since it uses less digits than its factorization.

318850640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 318850640 is about 17856.3893326731. The cubic root of 318850640 is about 683.1704887918.

The spelling of 318850640 in words is "three hundred eighteen million, eight hundred fifty thousand, six hundred forty".