318806228 has 24 divisors (see below), whose sum is σ = 602364840. Its totient is φ = 146764800.

The previous prime is 318806227. The next prime is 318806231. The reversal of 318806228 is 822608813.

It can be written as a sum of positive squares in 4 ways, for example, as 102657424 + 216148804 = 10132^2 + 14702^2 .

It is a super-2 number, since 2×318806228² = 203274822023175968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 318806191 and 318806200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318806227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13208 + ... + 28496.

It is an arithmetic number, because the mean of its divisors is an integer number (25098535).

Almost surely, 2^318806228 is an apocalyptic number.

It is an amenable number.

318806228 is a deficient number, since it is larger than the sum of its proper divisors (283558612).

318806228 is a wasteful number, since it uses less digits than its factorization.

318806228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15707 (or 15705 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 318806228 is about 17855.1457008897. The cubic root of 318806228 is about 683.1387682171.

The spelling of 318806228 in words is "three hundred eighteen million, eight hundred six thousand, two hundred twenty-eight".