442335540 has 48 divisors (see below), whose sum is σ = 1292393088. Its totient is φ = 112827264.

The previous prime is 442335527. The next prime is 442335557. The reversal of 442335540 is 45533244.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 442335498 and 442335507.

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 15 ways as a sum of consecutive naturals, for example, 158887 + ... + 161646.

It is an arithmetic number, because the mean of its divisors is an integer number (26924856).

Almost surely, 2^442335540 is an apocalyptic number.

It is an amenable number.

442335540 is an abundant number, since it is smaller than the sum of its proper divisors (850057548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442335540 is a wasteful number, since it uses less digits than its factorization.

442335540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320568 (or 320566 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

The square root of 442335540 is about 21031.7745328348. The cubic root of 442335540 is about 761.9338676840.

Adding to 442335540 its reverse (45533244), we get a palindrome (487868784).

The spelling of 442335540 in words is "four hundred forty-two million, three hundred thirty-five thousand, five hundred forty".