428723911 has 8 divisors (see below), whose sum is σ = 534513024. Its totient is φ = 334070520.

The previous prime is 428723909. The next prime is 428723917. The reversal of 428723911 is 119327824.

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

It is not a de Polignac number, because 428723911 - 2¹ = 428723909 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 (428723917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2783845 + ... + 2783998.

It is an arithmetic number, because the mean of its divisors is an integer number (66814128).

Almost surely, 2^428723911 is an apocalyptic number.

428723911 is a deficient number, since it is larger than the sum of its proper divisors (105789113).

428723911 is a wasteful number, since it uses less digits than its factorization.

428723911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567861.

The product of its digits is 24192, while the sum is 37.

The square root of 428723911 is about 20705.6492532835. The cubic root of 428723911 is about 754.0368467665.

The spelling of 428723911 in words is "four hundred twenty-eight million, seven hundred twenty-three thousand, nine hundred eleven".