228910447 has 2 divisors, whose sum is σ = 228910448. Its totient is φ = 228910446.

The previous prime is 228910439. The next prime is 228910469. The reversal of 228910447 is 744019822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228910447 - 2³ = 228910439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228910547) 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, 114455223 + 114455224.

It is an arithmetic number, because the mean of its divisors is an integer number (114455224).

Almost surely, 2^228910447 is an apocalyptic number.

228910447 is a deficient number, since it is larger than the sum of its proper divisors (1).

228910447 is an equidigital number, since it uses as much as digits as its factorization.

228910447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 228910447 is about 15129.7867466795. The cubic root of 228910447 is about 611.7235560323.

The spelling of 228910447 in words is "two hundred twenty-eight million, nine hundred ten thousand, four hundred forty-seven".