442432345 has 4 divisors (see below), whose sum is σ = 530918820. Its totient is φ = 353945872.

The previous prime is 442432337. The next prime is 442432349. The reversal of 442432345 is 543234244.

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 307686681 + 134745664 = 17541^2 + 11608^2 .

It is a cyclic number.

It is not a de Polignac number, because 442432345 - 2³ = 442432337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442432349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44243230 + ... + 44243239.

It is an arithmetic number, because the mean of its divisors is an integer number (132729705).

Almost surely, 2^442432345 is an apocalyptic number.

It is an amenable number.

442432345 is a deficient number, since it is larger than the sum of its proper divisors (88486475).

442432345 is an equidigital number, since it uses as much as digits as its factorization.

442432345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88486474.

The product of its digits is 46080, while the sum is 31.

The square root of 442432345 is about 21034.0758057016. The cubic root of 442432345 is about 761.9894466290.

Adding to 442432345 its reverse (543234244), we get a palindrome (985666589).

The spelling of 442432345 in words is "four hundred forty-two million, four hundred thirty-two thousand, three hundred forty-five".