428028017 has 2 divisors, whose sum is σ = 428028018. Its totient is φ = 428028016.

The previous prime is 428027983. The next prime is 428028031. The reversal of 428028017 is 710820824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353101681 + 74926336 = 18791^2 + 8656^2 .

It is a cyclic number.

It is not a de Polignac number, because 428028017 - 2¹⁶ = 427962481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428028037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214014008 + 214014009.

It is an arithmetic number, because the mean of its divisors is an integer number (214014009).

Almost surely, 2^428028017 is an apocalyptic number.

It is an amenable number.

428028017 is a deficient number, since it is larger than the sum of its proper divisors (1).

428028017 is an equidigital number, since it uses as much as digits as its factorization.

428028017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 428028017 is about 20688.8379809017. The cubic root of 428028017 is about 753.6286478692.

The spelling of 428028017 in words is "four hundred twenty-eight million, twenty-eight thousand, seventeen".