442999645 has 32 divisors (see below), whose sum is σ = 592220160. Its totient is φ = 315416640.

The previous prime is 442999639. The next prime is 442999657. The reversal of 442999645 is 546999244.

It is a happy number.

It is not a de Polignac number, because 442999645 - 2⁹ = 442999133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442999592 and 442999601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 880464 + ... + 880966.

It is an arithmetic number, because the mean of its divisors is an integer number (18506880).

Almost surely, 2^442999645 is an apocalyptic number.

It is an amenable number.

442999645 is a deficient number, since it is larger than the sum of its proper divisors (149220515).

442999645 is a wasteful number, since it uses less digits than its factorization.

442999645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its digits is 2799360, while the sum is 52.

The square root of 442999645 is about 21047.5567465680. The cubic root of 442999645 is about 762.3149894230.

The spelling of 442999645 in words is "four hundred forty-two million, nine hundred ninety-nine thousand, six hundred forty-five".