442020322 has 4 divisors (see below), whose sum is σ = 663030486. Its totient is φ = 221010160.

The previous prime is 442020283. The next prime is 442020323. The reversal of 442020322 is 223020244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 403567921 + 38452401 = 20089^2 + 6201^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442020322.

It is not an unprimeable number, because it can be changed into a prime (442020323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505079 + ... + 110505082.

Almost surely, 2^442020322 is an apocalyptic number.

442020322 is a deficient number, since it is larger than the sum of its proper divisors (221010164).

442020322 is a wasteful number, since it uses less digits than its factorization.

442020322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221010163.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 442020322 is about 21024.2793455567. The cubic root of 442020322 is about 761.7528344169.

Adding to 442020322 its reverse (223020244), we get a palindrome (665040566).

It can be divided in two parts, 4420 and 20322, that added together give a palindrome (24742).

The spelling of 442020322 in words is "four hundred forty-two million, twenty thousand, three hundred twenty-two".