428820859229 has 4 divisors (see below), whose sum is σ = 490080981984. Its totient is φ = 367560736476.

The previous prime is 428820859223. The next prime is 428820859253. The reversal of 428820859229 is 922958028824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428820859229 - 2¹⁶ = 428820793693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428820859223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30630061367 + ... + 30630061380.

It is an arithmetic number, because the mean of its divisors is an integer number (122520245496).

Almost surely, 2^428820859229 is an apocalyptic number.

It is an amenable number.

428820859229 is a deficient number, since it is larger than the sum of its proper divisors (61260122755).

428820859229 is an equidigital number, since it uses as much as digits as its factorization.

428820859229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61260122754.

The product of its (nonzero) digits is 13271040, while the sum is 59.

The spelling of 428820859229 in words is "four hundred twenty-eight billion, eight hundred twenty million, eight hundred fifty-nine thousand, two hundred twenty-nine".