428230365021 has 24 divisors (see below), whose sum is σ = 619364578560. Its totient is φ = 285113437056.

The previous prime is 428230365011. The next prime is 428230365047. The reversal of 428230365021 is 120563032824.

428230365021 is a `hidden beast` number, since 4 + 282 + 303 + 6 + 50 + 21 = 666.

It is not a de Polignac number, because 428230365021 - 2⁹ = 428230364509 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428230365011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40922836 + ... + 40933298.

It is an arithmetic number, because the mean of its divisors is an integer number (25806857440).

Almost surely, 2^428230365021 is an apocalyptic number.

It is an amenable number.

428230365021 is a deficient number, since it is larger than the sum of its proper divisors (191134213539).

428230365021 is a wasteful number, since it uses less digits than its factorization.

428230365021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15985 (or 15982 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 428230365021 its reverse (120563032824), we get a palindrome (548793397845).

The spelling of 428230365021 in words is "four hundred twenty-eight billion, two hundred thirty million, three hundred sixty-five thousand, twenty-one".