428889841 has 4 divisors (see below), whose sum is σ = 435920884. Its totient is φ = 421858800.

The previous prime is 428889803. The next prime is 428889859. The reversal of 428889841 is 148988824.

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 203889841 + 225000000 = 14279^2 + 15000^2 .

It is a cyclic number.

It is not a de Polignac number, because 428889841 - 2¹¹ = 428887793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428880841) 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, 3515430 + ... + 3515551.

It is an arithmetic number, because the mean of its divisors is an integer number (108980221).

Almost surely, 2^428889841 is an apocalyptic number.

It is an amenable number.

428889841 is a deficient number, since it is larger than the sum of its proper divisors (7031043).

428889841 is an equidigital number, since it uses as much as digits as its factorization.

428889841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031042.

The product of its digits is 1179648, while the sum is 52.

The square root of 428889841 is about 20709.6557431552. The cubic root of 428889841 is about 754.1341130901.

The spelling of 428889841 in words is "four hundred twenty-eight million, eight hundred eighty-nine thousand, eight hundred forty-one".