428728895 has 16 divisors (see below), whose sum is σ = 608247360. Its totient is φ = 283847424.

The previous prime is 428728891. The next prime is 428728897. The reversal of 428728895 is 598827824.

It is not a de Polignac number, because 428728895 - 2² = 428728891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428728891) 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 15 ways as a sum of consecutive naturals, for example, 210182 + ... + 212211.

It is an arithmetic number, because the mean of its divisors is an integer number (38015460).

Almost surely, 2^428728895 is an apocalyptic number.

428728895 is a deficient number, since it is larger than the sum of its proper divisors (179518465).

428728895 is a wasteful number, since it uses less digits than its factorization.

428728895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422434.

The product of its digits is 2580480, while the sum is 53.

The square root of 428728895 is about 20705.7696065614. The cubic root of 428728895 is about 754.0397686975.

The spelling of 428728895 in words is "four hundred twenty-eight million, seven hundred twenty-eight thousand, eight hundred ninety-five".