428999999 has 4 divisors (see below), whose sum is σ = 429060936. Its totient is φ = 428939064.

The previous prime is 428999971. The next prime is 429000017. The reversal of 428999999 is 999999824.

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

It is a cyclic number.

It is not a de Polignac number, because 428999999 - 2²⁰ = 427951423 is a prime.

It is a Duffinian number.

428999999 is a modest number, since divided by 99999 gives 4289 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428999939) 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, 18284 + ... + 34529.

It is an arithmetic number, because the mean of its divisors is an integer number (107265234).

Almost surely, 2^428999999 is an apocalyptic number.

428999999 is a deficient number, since it is larger than the sum of its proper divisors (60937).

428999999 is an equidigital number, since it uses as much as digits as its factorization.

428999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60936.

The product of its digits is 34012224, while the sum is 68.

The square root of 428999999 is about 20712.3151530678. The cubic root of 428999999 is about 754.1986726314.

The spelling of 428999999 in words is "four hundred twenty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-nine".