428834191 has 8 divisors (see below), whose sum is σ = 448003584. Its totient is φ = 409998360.

The previous prime is 428834179. The next prime is 428834201. The reversal of 428834191 is 191438824.

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

It is a cyclic number.

It is not a de Polignac number, because 428834191 - 2¹¹ = 428832143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428834291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80761 + ... + 85906.

It is an arithmetic number, because the mean of its divisors is an integer number (56000448).

Almost surely, 2^428834191 is an apocalyptic number.

428834191 is a deficient number, since it is larger than the sum of its proper divisors (19169393).

428834191 is a wasteful number, since it uses less digits than its factorization.

428834191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166781.

The product of its digits is 55296, while the sum is 40.

The square root of 428834191 is about 20708.3121233962. The cubic root of 428834191 is about 754.1014944744.

It can be divided in two parts, 428834 and 191, that added together give a square (429025 = 655²).

The spelling of 428834191 in words is "four hundred twenty-eight million, eight hundred thirty-four thousand, one hundred ninety-one".