428441641 has 2 divisors, whose sum is σ = 428441642. Its totient is φ = 428441640.

The previous prime is 428441623. The next prime is 428441653. The reversal of 428441641 is 146144824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417017241 + 11424400 = 20421^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 428441641 - 2⁹ = 428441129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428441597 and 428441606.

It is not a weakly prime, because it can be changed into another prime (428441681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214220820 + 214220821.

It is an arithmetic number, because the mean of its divisors is an integer number (214220821).

Almost surely, 2^428441641 is an apocalyptic number.

It is an amenable number.

428441641 is a deficient number, since it is larger than the sum of its proper divisors (1).

428441641 is an equidigital number, since it uses as much as digits as its factorization.

428441641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 34.

The square root of 428441641 is about 20698.8318752533. The cubic root of 428441641 is about 753.8713255505.

The spelling of 428441641 in words is "four hundred twenty-eight million, four hundred forty-one thousand, six hundred forty-one".