318499920 has 120 divisors (see below), whose sum is σ = 1076232456. Its totient is φ = 84409344.

The previous prime is 318499919. The next prime is 318499927. The reversal of 318499920 is 29994813.

318499920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 80353296 + 238146624 = 8964^2 + 15432^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318499927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123282 + ... + 125838.

Almost surely, 2^318499920 is an apocalyptic number.

318499920 is a gapful number since it is divisible by the number (30) 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 318499920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538116228).

318499920 is an abundant number, since it is smaller than the sum of its proper divisors (757732536).

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

318499920 is a wasteful number, since it uses less digits than its factorization.

318499920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 318499920 is about 17846.5660562473. The cubic root of 318499920 is about 682.9199122653.

The spelling of 318499920 in words is "three hundred eighteen million, four hundred ninety-nine thousand, nine hundred twenty".