428170317 has 4 divisors (see below), whose sum is σ = 570893760. Its totient is φ = 285446876.

The previous prime is 428170289. The next prime is 428170321. The reversal of 428170317 is 713071824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428170317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428170397) 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, 71361717 + ... + 71361722.

It is an arithmetic number, because the mean of its divisors is an integer number (142723440).

Almost surely, 2^428170317 is an apocalyptic number.

It is an amenable number.

428170317 is a deficient number, since it is larger than the sum of its proper divisors (142723443).

428170317 is a wasteful number, since it uses less digits than its factorization.

428170317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142723442.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 428170317 is about 20692.2767476177. The cubic root of 428170317 is about 753.7121544546.

The spelling of 428170317 in words is "four hundred twenty-eight million, one hundred seventy thousand, three hundred seventeen".