318003138 has 32 divisors (see below), whose sum is σ = 709204800. Its totient is φ = 105621408.

The previous prime is 318003137. The next prime is 318003143. The reversal of 318003138 is 831300813.

It is a super-2 number, since 2×318003138² = 202251991555694088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (318003137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4878 + ... + 25686.

It is an arithmetic number, because the mean of its divisors is an integer number (22162650).

Almost surely, 2^318003138 is an apocalyptic number.

318003138 is an abundant number, since it is smaller than the sum of its proper divisors (391201662).

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

318003138 is a wasteful number, since it uses less digits than its factorization.

318003138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21103 (or 21097 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 318003138 is about 17832.6424850609. The cubic root of 318003138 is about 682.5646648065.

The spelling of 318003138 in words is "three hundred eighteen million, three thousand, one hundred thirty-eight".