441563809 has 8 divisors (see below), whose sum is σ = 464560488. Its totient is φ = 419149440.

The previous prime is 441563807. The next prime is 441563813. The reversal of 441563809 is 908365144.

It can be written as a sum of positive squares in 4 ways, for example, as 114062400 + 327501409 = 10680^2 + 18097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 441563809 - 2¹ = 441563807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (441563803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144022 + ... + 147055.

It is an arithmetic number, because the mean of its divisors is an integer number (58070061).

Almost surely, 2^441563809 is an apocalyptic number.

It is an amenable number.

441563809 is a deficient number, since it is larger than the sum of its proper divisors (22996679).

441563809 is a wasteful number, since it uses less digits than its factorization.

441563809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291155.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 441563809 is about 21013.4197359687. The cubic root of 441563809 is about 761.4905011859.

It can be divided in two parts, 4 and 41563809, that multiplied together give a square (166255236 = 12894²).

The spelling of 441563809 in words is "four hundred forty-one million, five hundred sixty-three thousand, eight hundred nine".