228665318 has 16 divisors (see below), whose sum is σ = 392221440. Its totient is φ = 97943496.

The previous prime is 228665299. The next prime is 228665321. The reversal of 228665318 is 813566822.

It is a super-2 number, since 2×228665318² = 104575655312082248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29255 + ... + 36237.

It is an arithmetic number, because the mean of its divisors is an integer number (24513840).

Almost surely, 2^228665318 is an apocalyptic number.

228665318 is a deficient number, since it is larger than the sum of its proper divisors (163556122).

228665318 is a wasteful number, since it uses less digits than its factorization.

228665318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331.

The product of its digits is 138240, while the sum is 41.

The square root of 228665318 is about 15121.6837025511. The cubic root of 228665318 is about 611.5051230999.

The spelling of 228665318 in words is "two hundred twenty-eight million, six hundred sixty-five thousand, three hundred eighteen".