428212643 has 8 divisors (see below), whose sum is σ = 473115168. Its totient is φ = 385500544.

The previous prime is 428212621. The next prime is 428212649. The reversal of 428212643 is 346212824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428212643 - 2¹⁴ = 428196259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428212649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547196 + ... + 547977.

It is an arithmetic number, because the mean of its divisors is an integer number (59139396).

Almost surely, 2^428212643 is an apocalyptic number.

428212643 is a deficient number, since it is larger than the sum of its proper divisors (44902525).

428212643 is a wasteful number, since it uses less digits than its factorization.

428212643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095213.

The product of its digits is 18432, while the sum is 32.

The square root of 428212643 is about 20693.2994710848. The cubic root of 428212643 is about 753.7369892522.

The spelling of 428212643 in words is "four hundred twenty-eight million, two hundred twelve thousand, six hundred forty-three".