318939380 has 24 divisors (see below), whose sum is σ = 709171848. Its totient is φ = 120071168.

The previous prime is 318939359. The next prime is 318939389. The reversal of 318939380 is 83939813.

318939380 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 29463184 + 289476196 = 5428^2 + 17014^2 .

It is a super-2 number, since 2×318939380² = 203444656229568800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318939389) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 468689 + ... + 469368.

It is an arithmetic number, because the mean of its divisors is an integer number (29548827).

Almost surely, 2^318939380 is an apocalyptic number.

It is an amenable number.

318939380 is an abundant number, since it is smaller than the sum of its proper divisors (390232468).

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

318939380 is a wasteful number, since it uses less digits than its factorization.

318939380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938083 (or 938081 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 318939380 is about 17858.8739846610. The cubic root of 318939380 is about 683.2338611238.

The spelling of 318939380 in words is "three hundred eighteen million, nine hundred thirty-nine thousand, three hundred eighty".