428923219 has 4 divisors (see below), whose sum is σ = 428965120. Its totient is φ = 428881320.

The previous prime is 428923211. The next prime is 428923241. The reversal of 428923219 is 912329824.

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 not a de Polignac number, because 428923219 - 2³ = 428923211 is a prime.

It is a super-2 number, since 2×428923219² = 367950255594643922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428923211) 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, 5737 + ... + 29845.

It is an arithmetic number, because the mean of its divisors is an integer number (107241280).

Almost surely, 2^428923219 is an apocalyptic number.

428923219 is a deficient number, since it is larger than the sum of its proper divisors (41901).

428923219 is a wasteful number, since it uses less digits than its factorization.

428923219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41900.

The product of its digits is 62208, while the sum is 40.

The square root of 428923219 is about 20710.4615834607. The cubic root of 428923219 is about 754.1536758721.

The spelling of 428923219 in words is "four hundred twenty-eight million, nine hundred twenty-three thousand, two hundred nineteen".