428828685 has 8 divisors (see below), whose sum is σ = 686125920. Its totient is φ = 228708624.

The previous prime is 428828683. The next prime is 428828747. The reversal of 428828685 is 586828824.

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

It is not a de Polignac number, because 428828685 - 2¹ = 428828683 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428828683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14294275 + ... + 14294304.

It is an arithmetic number, because the mean of its divisors is an integer number (85765740).

Almost surely, 2^428828685 is an apocalyptic number.

It is an amenable number.

428828685 is a deficient number, since it is larger than the sum of its proper divisors (257297235).

428828685 is a wasteful number, since it uses less digits than its factorization.

428828685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28588587.

The product of its digits is 1966080, while the sum is 51.

The square root of 428828685 is about 20708.1791811835. The cubic root of 428828685 is about 754.0982670416.

The spelling of 428828685 in words is "four hundred twenty-eight million, eight hundred twenty-eight thousand, six hundred eighty-five".