428342881 has 2 divisors, whose sum is σ = 428342882. Its totient is φ = 428342880.

The previous prime is 428342843. The next prime is 428342899. The reversal of 428342881 is 188243824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336355600 + 91987281 = 18340^2 + 9591^2 .

It is a cyclic number.

It is not a de Polignac number, because 428342881 - 2¹¹ = 428340833 is a prime.

It is a super-2 number, since 2×428342881² = 366955247406760322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428342801) 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, 214171440 + 214171441.

It is an arithmetic number, because the mean of its divisors is an integer number (214171441).

Almost surely, 2^428342881 is an apocalyptic number.

It is an amenable number.

428342881 is a deficient number, since it is larger than the sum of its proper divisors (1).

428342881 is an equidigital number, since it uses as much as digits as its factorization.

428342881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98304, while the sum is 40.

The square root of 428342881 is about 20696.4460958881. The cubic root of 428342881 is about 753.8133961879.

The spelling of 428342881 in words is "four hundred twenty-eight million, three hundred forty-two thousand, eight hundred eighty-one".