318663620 has 96 divisors (see below), whose sum is σ = 773369856. Its totient is φ = 109155200.

The previous prime is 318663617. The next prime is 318663641. The reversal of 318663620 is 26366813.

It is a super-4 number, since 4×318663620⁴ (a number of 35 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358817 + ... + 359703.

It is an arithmetic number, because the mean of its divisors is an integer number (8055936).

Almost surely, 2^318663620 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 318663620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386684928).

318663620 is an abundant number, since it is smaller than the sum of its proper divisors (454706236).

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

318663620 is a wasteful number, since it uses less digits than its factorization.

318663620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 318663620 is about 17851.1517835685. The cubic root of 318663620 is about 683.0368927678.

The spelling of 318663620 in words is "three hundred eighteen million, six hundred sixty-three thousand, six hundred twenty".