428815017 has 6 divisors (see below), whose sum is σ = 619399482. Its totient is φ = 285876672.

The previous prime is 428815003. The next prime is 428815027. The reversal of 428815017 is 710518824.

It can be written as a sum of positive squares in only one way, i.e., 404371881 + 24443136 = 20109^2 + 4944^2 .

It is not a de Polignac number, because 428815017 - 2⁴ = 428815001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428815027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23823048 + ... + 23823065.

It is an arithmetic number, because the mean of its divisors is an integer number (103233247).

Almost surely, 2^428815017 is an apocalyptic number.

It is an amenable number.

428815017 is a deficient number, since it is larger than the sum of its proper divisors (190584465).

428815017 is a wasteful number, since it uses less digits than its factorization.

428815017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47646119 (or 47646116 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 428815017 is about 20707.8491640247. The cubic root of 428815017 is about 754.0902551983.

The spelling of 428815017 in words is "four hundred twenty-eight million, eight hundred fifteen thousand, seventeen".