428389502471 has 4 divisors (see below), whose sum is σ = 489588002832. Its totient is φ = 367191002112.

The previous prime is 428389502447. The next prime is 428389502501. The reversal of 428389502471 is 174205983824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428389502471 - 2¹⁰ = 428389501447 is a prime.

It is a super-3 number, since 3×428389502471³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428389552471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30599250170 + ... + 30599250183.

It is an arithmetic number, because the mean of its divisors is an integer number (122397000708).

Almost surely, 2^428389502471 is an apocalyptic number.

428389502471 is a deficient number, since it is larger than the sum of its proper divisors (61198500361).

428389502471 is an equidigital number, since it uses as much as digits as its factorization.

428389502471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61198500360.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 428389502471 in words is "four hundred twenty-eight billion, three hundred eighty-nine million, five hundred two thousand, four hundred seventy-one".