428789441 has 4 divisors (see below), whose sum is σ = 428862084. Its totient is φ = 428716800.

The previous prime is 428789429. The next prime is 428789443. The reversal of 428789441 is 144987824.

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 410265025 + 18524416 = 20255^2 + 4304^2 .

It is a cyclic number.

It is not a de Polignac number, because 428789441 - 2¹⁰ = 428788417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428789443) 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, 26600 + ... + 39561.

It is an arithmetic number, because the mean of its divisors is an integer number (107215521).

Almost surely, 2^428789441 is an apocalyptic number.

It is an amenable number.

428789441 is a deficient number, since it is larger than the sum of its proper divisors (72643).

428789441 is an equidigital number, since it uses as much as digits as its factorization.

428789441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72642.

The product of its digits is 516096, while the sum is 47.

The square root of 428789441 is about 20707.2316112029. The cubic root of 428789441 is about 754.0752627229.

The spelling of 428789441 in words is "four hundred twenty-eight million, seven hundred eighty-nine thousand, four hundred forty-one".