442543240 has 16 divisors (see below), whose sum is σ = 995722380. Its totient is φ = 177017280.

The previous prime is 442543237. The next prime is 442543243. The reversal of 442543240 is 42345244.

It is an interprime number because it is at equal distance from previous prime (442543237) and next prime (442543243).

It can be written as a sum of positive squares in 2 ways, for example, as 404572996 + 37970244 = 20114^2 + 6162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 442543199 and 442543208.

It is not an unprimeable number, because it can be changed into a prime (442543243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5531751 + ... + 5531830.

Almost surely, 2^442543240 is an apocalyptic number.

442543240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442543240 is an abundant number, since it is smaller than the sum of its proper divisors (553179140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442543240 is a wasteful number, since it uses less digits than its factorization.

442543240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11063592 (or 11063588 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 442543240 is about 21036.7117202285. The cubic root of 442543240 is about 762.0531051459.

Adding to 442543240 its reverse (42345244), we get a palindrome (484888484).

The spelling of 442543240 in words is "four hundred forty-two million, five hundred forty-three thousand, two hundred forty".