420044005 has 4 divisors (see below), whose sum is σ = 504052812. Its totient is φ = 336035200.

The previous prime is 420044003. The next prime is 420044021. The reversal of 420044005 is 500440024.

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 169676676 + 250367329 = 13026^2 + 15823^2 .

It is not a de Polignac number, because 420044005 - 2¹ = 420044003 is a prime.

It is a super-3 number, since 3×420044005³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420044003) 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, 42004396 + ... + 42004405.

It is an arithmetic number, because the mean of its divisors is an integer number (126013203).

Almost surely, 2^420044005 is an apocalyptic number.

It is an amenable number.

420044005 is a deficient number, since it is larger than the sum of its proper divisors (84008807).

420044005 is an equidigital number, since it uses as much as digits as its factorization.

420044005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84008806.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 420044005 is about 20494.9751158668. The cubic root of 420044005 is about 748.9133923981.

Adding to 420044005 its reverse (500440024), we get a palindrome (920484029).

It can be divided in two parts, 4200 and 44005, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 420044005 in words is "four hundred twenty million, forty-four thousand, five".