428466881 has 2 divisors, whose sum is σ = 428466882. Its totient is φ = 428466880.

The previous prime is 428466869. The next prime is 428466887. The reversal of 428466881 is 188664824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262958656 + 165508225 = 16216^2 + 12865^2 .

It is a cyclic number.

It is not a de Polignac number, because 428466881 - 2¹⁰ = 428465857 is a prime.

It is a super-3 number, since 3×428466881³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (428466887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214233440 + 214233441.

It is an arithmetic number, because the mean of its divisors is an integer number (214233441).

Almost surely, 2^428466881 is an apocalyptic number.

It is an amenable number.

428466881 is a deficient number, since it is larger than the sum of its proper divisors (1).

428466881 is an equidigital number, since it uses as much as digits as its factorization.

428466881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 589824, while the sum is 47.

The square root of 428466881 is about 20699.4415625156. The cubic root of 428466881 is about 753.8861290747.

The spelling of 428466881 in words is "four hundred twenty-eight million, four hundred sixty-six thousand, eight hundred eighty-one".