428885719 has 2 divisors, whose sum is σ = 428885720. Its totient is φ = 428885718.

The previous prime is 428885701. The next prime is 428885729. The reversal of 428885719 is 917588824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428885719 - 2⁷ = 428885591 is a prime.

It is a super-2 number, since 2×428885719² = 367885919924293922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428885729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214442859 + 214442860.

It is an arithmetic number, because the mean of its divisors is an integer number (214442860).

Almost surely, 2^428885719 is an apocalyptic number.

428885719 is a deficient number, since it is larger than the sum of its proper divisors (1).

428885719 is an equidigital number, since it uses as much as digits as its factorization.

428885719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 52.

The square root of 428885719 is about 20709.5562241203. The cubic root of 428885719 is about 754.1316971233.

The spelling of 428885719 in words is "four hundred twenty-eight million, eight hundred eighty-five thousand, seven hundred nineteen".