228440473 has 2 divisors, whose sum is σ = 228440474. Its totient is φ = 228440472.

The previous prime is 228440411. The next prime is 228440489. The reversal of 228440473 is 374044822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228221449 + 219024 = 15107^2 + 468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228440473 is a prime.

It is not a weakly prime, because it can be changed into another prime (228440273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114220236 + 114220237.

It is an arithmetic number, because the mean of its divisors is an integer number (114220237).

Almost surely, 2^228440473 is an apocalyptic number.

It is an amenable number.

228440473 is a deficient number, since it is larger than the sum of its proper divisors (1).

228440473 is an equidigital number, since it uses as much as digits as its factorization.

228440473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 228440473 is about 15114.2473514231. The cubic root of 228440473 is about 611.3046278072.

The spelling of 228440473 in words is "two hundred twenty-eight million, four hundred forty thousand, four hundred seventy-three".