228368641 has 2 divisors, whose sum is σ = 228368642. Its totient is φ = 228368640.

The previous prime is 228368627. The next prime is 228368663. The reversal of 228368641 is 146863822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193794241 + 34574400 = 13921^2 + 5880^2 .

It is a cyclic number.

It is not a de Polignac number, because 228368641 - 2⁷ = 228368513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 228368594 and 228368603.

It is not a weakly prime, because it can be changed into another prime (228368611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114184320 + 114184321.

It is an arithmetic number, because the mean of its divisors is an integer number (114184321).

Almost surely, 2^228368641 is an apocalyptic number.

It is an amenable number.

228368641 is a deficient number, since it is larger than the sum of its proper divisors (1).

228368641 is an equidigital number, since it uses as much as digits as its factorization.

228368641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 40.

The square root of 228368641 is about 15111.8708636621. The cubic root of 228368641 is about 611.2405471639.

The spelling of 228368641 in words is "two hundred twenty-eight million, three hundred sixty-eight thousand, six hundred forty-one".