428904569 has 4 divisors (see below), whose sum is σ = 429086196. Its totient is φ = 428722944.

The previous prime is 428904557. The next prime is 428904589. The reversal of 428904569 is 965409824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131790400 + 297114169 = 11480^2 + 17237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428904569 is a prime.

It is a super-2 number, since 2×428904569² = 367918258618151522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428904589) 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, 87224 + ... + 92009.

It is an arithmetic number, because the mean of its divisors is an integer number (107271549).

Almost surely, 2^428904569 is an apocalyptic number.

It is an amenable number.

428904569 is a deficient number, since it is larger than the sum of its proper divisors (181627).

428904569 is a wasteful number, since it uses less digits than its factorization.

428904569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181626.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 428904569 is about 20710.0113230293. The cubic root of 428904569 is about 754.1427452679.

The spelling of 428904569 in words is "four hundred twenty-eight million, nine hundred four thousand, five hundred sixty-nine".