318138012 has 36 divisors (see below), whose sum is σ = 819360360. Its totient is φ = 104044512.

The previous prime is 318137999. The next prime is 318138013. The reversal of 318138012 is 210831813.

318138012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318138013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81462 + ... + 85277.

It is an arithmetic number, because the mean of its divisors is an integer number (22760010).

Almost surely, 2^318138012 is an apocalyptic number.

It is an amenable number.

318138012 is an abundant number, since it is smaller than the sum of its proper divisors (501222348).

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

318138012 is a wasteful number, since it uses less digits than its factorization.

318138012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166802 (or 166797 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 318138012 is about 17836.4237446860. The cubic root of 318138012 is about 682.6611494042.

Adding to 318138012 its reverse (210831813), we get a palindrome (528969825).

The spelling of 318138012 in words is "three hundred eighteen million, one hundred thirty-eight thousand, twelve".