428886719 has 4 divisors (see below), whose sum is σ = 428931600. Its totient is φ = 428841840.

The previous prime is 428886707. The next prime is 428886739. The reversal of 428886719 is 917688824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428886719 is a prime.

It is a super-2 number, since 2×428886719² = 367887635469169922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428886739) 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, 1742 + ... + 29339.

It is an arithmetic number, because the mean of its divisors is an integer number (107232900).

Almost surely, 2^428886719 is an apocalyptic number.

428886719 is a deficient number, since it is larger than the sum of its proper divisors (44881).

428886719 is a wasteful number, since it uses less digits than its factorization.

428886719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44880.

The product of its digits is 1548288, while the sum is 53.

The square root of 428886719 is about 20709.5803675497. The cubic root of 428886719 is about 754.1322832399.

The spelling of 428886719 in words is "four hundred twenty-eight million, eight hundred eighty-six thousand, seven hundred nineteen".