428801647 has 2 divisors, whose sum is σ = 428801648. Its totient is φ = 428801646.

The previous prime is 428801609. The next prime is 428801677. The reversal of 428801647 is 746108824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428801647 - 2¹¹ = 428799599 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428801677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214400823 + 214400824.

It is an arithmetic number, because the mean of its divisors is an integer number (214400824).

Almost surely, 2^428801647 is an apocalyptic number.

428801647 is a deficient number, since it is larger than the sum of its proper divisors (1).

428801647 is an equidigital number, since it uses as much as digits as its factorization.

428801647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 428801647 is about 20707.5263370592. The cubic root of 428801647 is about 754.0824178706.

The spelling of 428801647 in words is "four hundred twenty-eight million, eight hundred one thousand, six hundred forty-seven".