318009490 has 8 divisors (see below), whose sum is σ = 572417100. Its totient is φ = 127203792.

The previous prime is 318009481. The next prime is 318009491. The reversal of 318009490 is 94900813.

It can be written as a sum of positive squares in 2 ways, for example, as 317445489 + 564001 = 17817^2 + 751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×318009490² = 202260071460120200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (318009491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15900465 + ... + 15900484.

Almost surely, 2^318009490 is an apocalyptic number.

318009490 is a deficient number, since it is larger than the sum of its proper divisors (254407610).

318009490 is a wasteful number, since it uses less digits than its factorization.

318009490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31800956.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 318009490 is about 17832.8205845290. The cubic root of 318009490 is about 682.5692094387.

The spelling of 318009490 in words is "three hundred eighteen million, nine thousand, four hundred ninety".