428885728 has 12 divisors (see below), whose sum is σ = 844368840. Its totient is φ = 214442848.

The previous prime is 428885719. The next prime is 428885729. The reversal of 428885728 is 827588824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428885729) 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 as a sum of consecutive naturals, namely, 6701308 + ... + 6701371.

It is an arithmetic number, because the mean of its divisors is an integer number (70364070).

Almost surely, 2^428885728 is an apocalyptic number.

It is an amenable number.

428885728 is a deficient number, since it is larger than the sum of its proper divisors (415483112).

428885728 is a wasteful number, since it uses less digits than its factorization.

428885728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13402689 (or 13402681 counting only the distinct ones).

The product of its digits is 2293760, while the sum is 52.

The square root of 428885728 is about 20709.5564414113. The cubic root of 428885728 is about 754.1317023984.

The spelling of 428885728 in words is "four hundred twenty-eight million, eight hundred eighty-five thousand, seven hundred twenty-eight".