442430505 has 80 divisors (see below), whose sum is σ = 884024064. Its totient is φ = 209848320.

The previous prime is 442430501. The next prime is 442430509. The reversal of 442430505 is 505034244.

It is an interprime number because it is at equal distance from previous prime (442430501) and next prime (442430509).

It is not a de Polignac number, because 442430505 - 2² = 442430501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (442430501) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 208329 + ... + 210441.

Almost surely, 2^442430505 is an apocalyptic number.

442430505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

442430505 is a deficient number, since it is larger than the sum of its proper divisors (441593559).

442430505 is a wasteful number, since it uses less digits than its factorization.

442430505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 442430505 is about 21034.0320671050. The cubic root of 442430505 is about 761.9883902999.

Adding to 442430505 its reverse (505034244), we get a palindrome (947464749).

The spelling of 442430505 in words is "four hundred forty-two million, four hundred thirty thousand, five hundred five".