318990500 has 48 divisors (see below), whose sum is σ = 698456304. Its totient is φ = 127270400.

The previous prime is 318990493. The next prime is 318990569. The reversal of 318990500 is 5099813.

It can be written as a sum of positive squares in 8 ways, for example, as 68591524 + 250398976 = 8282^2 + 15824^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326012 + ... + 326988.

It is an arithmetic number, because the mean of its divisors is an integer number (14551173).

Almost surely, 2^318990500 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 318990500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349228152).

318990500 is an abundant number, since it is smaller than the sum of its proper divisors (379465804).

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

318990500 is a wasteful number, since it uses less digits than its factorization.

318990500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 318990500 is about 17860.3051485690. The cubic root of 318990500 is about 683.2703623643.

The spelling of 318990500 in words is "three hundred eighteen million, nine hundred ninety thousand, five hundred".