428432288645 has 4 divisors (see below), whose sum is σ = 514118746380. Its totient is φ = 342745830912.

The previous prime is 428432288587. The next prime is 428432288651. The reversal of 428432288645 is 546882234824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 79313203876 + 349119084769 = 281626^2 + 590863^2 .

It is a cyclic number.

It is not a de Polignac number, because 428432288645 - 2¹² = 428432284549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42843228860 + ... + 42843228869.

It is an arithmetic number, because the mean of its divisors is an integer number (128529686595).

Almost surely, 2^428432288645 is an apocalyptic number.

It is an amenable number.

428432288645 is a deficient number, since it is larger than the sum of its proper divisors (85686457735).

428432288645 is an equidigital number, since it uses as much as digits as its factorization.

428432288645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85686457734.

The product of its digits is 23592960, while the sum is 56.

The spelling of 428432288645 in words is "four hundred twenty-eight billion, four hundred thirty-two million, two hundred eighty-eight thousand, six hundred forty-five".