442390347 has 48 divisors (see below), whose sum is σ = 745784832. Its totient is φ = 247484160.

The previous prime is 442390339. The next prime is 442390457. The reversal of 442390347 is 743093244.

It is not a de Polignac number, because 442390347 - 2³ = 442390339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442390327) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1312563 + ... + 1312899.

It is an arithmetic number, because the mean of its divisors is an integer number (15537184).

Almost surely, 2^442390347 is an apocalyptic number.

442390347 is a deficient number, since it is larger than the sum of its proper divisors (303394485).

442390347 is a wasteful number, since it uses less digits than its factorization.

442390347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 442390347 is about 21033.0774495793. The cubic root of 442390347 is about 761.9653351871.

It can be divided in two parts, 44 and 2390347, that added together give a triangular number (2390391 = T₂₁₈₆).

The spelling of 442390347 in words is "four hundred forty-two million, three hundred ninety thousand, three hundred forty-seven".