428585214421 has 12 divisors (see below), whose sum is σ = 536908950732. Its totient is φ = 339100388928.

The previous prime is 428585214383. The next prime is 428585214461. The reversal of 428585214421 is 124412585824.

It can be written as a sum of positive squares in 2 ways, for example, as 20941273521 + 407643940900 = 144711^2 + 638470^2 .

It is not a de Polignac number, because 428585214421 - 2⁷ = 428585214293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428585214461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336408480 + ... + 336409753.

It is an arithmetic number, because the mean of its divisors is an integer number (44742412561).

Almost surely, 2^428585214421 is an apocalyptic number.

It is an amenable number.

428585214421 is a deficient number, since it is larger than the sum of its proper divisors (108323736311).

428585214421 is a wasteful number, since it uses less digits than its factorization.

428585214421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672818260 (or 672818253 counting only the distinct ones).

The product of its digits is 819200, while the sum is 46.

The spelling of 428585214421 in words is "four hundred twenty-eight billion, five hundred eighty-five million, two hundred fourteen thousand, four hundred twenty-one".