428643041 has 4 divisors (see below), whose sum is σ = 430819092. Its totient is φ = 426466992.

The previous prime is 428643037. The next prime is 428643053. The reversal of 428643041 is 140346824.

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 252682816 + 175960225 = 15896^2 + 13265^2 .

It is a cyclic number.

It is not a de Polignac number, because 428643041 - 2² = 428643037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 428642989 and 428643007.

It is not an unprimeable number, because it can be changed into a prime (428643031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087730 + ... + 1088123.

It is an arithmetic number, because the mean of its divisors is an integer number (107704773).

Almost surely, 2^428643041 is an apocalyptic number.

It is an amenable number.

428643041 is a deficient number, since it is larger than the sum of its proper divisors (2176051).

428643041 is a wasteful number, since it uses less digits than its factorization.

428643041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176050.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 428643041 is about 20703.6963124945. The cubic root of 428643041 is about 753.9894325738.

Adding to 428643041 its reverse (140346824), we get a palindrome (568989865).

The spelling of 428643041 in words is "four hundred twenty-eight million, six hundred forty-three thousand, forty-one".