442002445 has 8 divisors (see below), whose sum is σ = 531289080. Its totient is φ = 353011200.

The previous prime is 442002439. The next prime is 442002497. The reversal of 442002445 is 544200244.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 249292521 + 192709924 = 15789^2 + 13882^2 .

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

It is not a de Polignac number, because 442002445 - 2³ = 442002437 is a prime.

It is a super-2 number, since 2×442002445² = 390732322771956050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70540 + ... + 76549.

It is an arithmetic number, because the mean of its divisors is an integer number (66411135).

Almost surely, 2^442002445 is an apocalyptic number.

It is an amenable number.

442002445 is a deficient number, since it is larger than the sum of its proper divisors (89286635).

442002445 is a wasteful number, since it uses less digits than its factorization.

442002445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147695.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 442002445 is about 21023.8541899434. The cubic root of 442002445 is about 761.7425648747.

Adding to 442002445 its reverse (544200244), we get a palindrome (986202689).

The spelling of 442002445 in words is "four hundred forty-two million, two thousand, four hundred forty-five".