442440442 has 8 divisors (see below), whose sum is σ = 674540532. Its totient is φ = 217593600.

The previous prime is 442440433. The next prime is 442440457. The reversal of 442440442 is 244044244.

It can be written as a sum of positive squares in 2 ways, for example, as 425143161 + 17297281 = 20619^2 + 4159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 442440442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813159 + ... + 1813402.

Almost surely, 2^442440442 is an apocalyptic number.

442440442 is a deficient number, since it is larger than the sum of its proper divisors (232100090).

442440442 is a wasteful number, since it uses less digits than its factorization.

442440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626624.

The product of its (nonzero) digits is 16384, while the sum is 28.

The square root of 442440442 is about 21034.2682782169. The cubic root of 442440442 is about 761.9940950165.

Adding to 442440442 its reverse (244044244), we get a palindrome (686484686).

The spelling of 442440442 in words is "four hundred forty-two million, four hundred forty thousand, four hundred forty-two".