428648029 has 2 divisors, whose sum is σ = 428648030. Its totient is φ = 428648028.

The previous prime is 428648027. The next prime is 428648053. The reversal of 428648029 is 920846824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404412100 + 24235929 = 20110^2 + 4923^2 .

It is a cyclic number.

It is not a de Polignac number, because 428648029 - 2¹ = 428648027 is a prime.

Together with 428648027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428648021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214324014 + 214324015.

It is an arithmetic number, because the mean of its divisors is an integer number (214324015).

Almost surely, 2^428648029 is an apocalyptic number.

It is an amenable number.

428648029 is a deficient number, since it is larger than the sum of its proper divisors (1).

428648029 is an equidigital number, since it uses as much as digits as its factorization.

428648029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 428648029 is about 20703.8167737256. The cubic root of 428648029 is about 753.9923572177.

The spelling of 428648029 in words is "four hundred twenty-eight million, six hundred forty-eight thousand, twenty-nine".