428117056 has 28 divisors (see below), whose sum is σ = 859101660. Its totient is φ = 211650560.

The previous prime is 428117029. The next prime is 428117057. The reversal of 428117056 is 650711824.

It can be written as a sum of positive squares in 2 ways, for example, as 112699456 + 315417600 = 10616^2 + 17760^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428117057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31885 + ... + 43276.

Almost surely, 2^428117056 is an apocalyptic number.

It is an amenable number.

428117056 is an abundant number, since it is smaller than the sum of its proper divisors (430984604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428117056 is an equidigital number, since it uses as much as digits as its factorization.

428117056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75262 (or 75252 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 428117056 is about 20690.9897298317. The cubic root of 428117056 is about 753.6809012156.

The spelling of 428117056 in words is "four hundred twenty-eight million, one hundred seventeen thousand, fifty-six".