442320534 has 32 divisors (see below), whose sum is σ = 983651040. Its totient is φ = 147332736.

The previous prime is 442320503. The next prime is 442320611. The reversal of 442320534 is 435023244.

442320534 is a `hidden beast` number, since 4 + 423 + 205 + 34 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 442320498 and 442320507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113482 + ... + 117314.

It is an arithmetic number, because the mean of its divisors is an integer number (30739095).

Almost surely, 2^442320534 is an apocalyptic number.

442320534 is an abundant number, since it is smaller than the sum of its proper divisors (541330506).

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

442320534 is a wasteful number, since it uses less digits than its factorization.

442320534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981 (or 5975 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 442320534 is about 21031.4177838775. The cubic root of 442320534 is about 761.9252515183.

Adding to 442320534 its reverse (435023244), we get a palindrome (877343778).

The spelling of 442320534 in words is "four hundred forty-two million, three hundred twenty thousand, five hundred thirty-four".