428719 has 4 divisors (see below), whose sum is σ = 440344. Its totient is φ = 417096.

The previous prime is 428693. The next prime is 428731. The reversal of 428719 is 917824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428719 is a prime.

It is a super-2 number, since 2×428719² = 367599961922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5757 + ... + 5830.

It is an arithmetic number, because the mean of its divisors is an integer number (110086).

2⁴²⁸⁷¹⁹ is an apocalyptic number.

428719 is a deficient number, since it is larger than the sum of its proper divisors (11625).

428719 is a wasteful number, since it uses less digits than its factorization.

428719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11624.

The product of its digits is 4032, while the sum is 31.

The square root of 428719 is about 654.7663705475. The cubic root of 428719 is about 75.4033967610.

The spelling of 428719 in words is "four hundred twenty-eight thousand, seven hundred nineteen".