318000040 has 16 divisors (see below), whose sum is σ = 715500180. Its totient is φ = 127200000.

The previous prime is 317999959. The next prime is 318000049. The reversal of 318000040 is 40000813.

It can be written as a sum of positive squares in 2 ways, for example, as 305340676 + 12659364 = 17474^2 + 3558^2 .

It is a super-2 number, since 2×318000040² = 202248050880003200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 317999978 and 318000023.

It is not an unprimeable number, because it can be changed into a prime (318000049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3974961 + ... + 3975040.

Almost surely, 2^318000040 is an apocalyptic number.

It is an amenable number.

318000040 is an abundant number, since it is smaller than the sum of its proper divisors (397500140).

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

318000040 is a wasteful number, since it uses less digits than its factorization.

318000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950012 (or 7950008 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 318000040 is about 17832.5556216713. Note that the first 3 decimals coincide. The cubic root of 318000040 is about 682.5624482747.

Adding to 318000040 its reverse (40000813), we get a palindrome (358000853).

The spelling of 318000040 in words is "three hundred eighteen million, forty", and thus it is an aban number.