442686544 has 10 divisors (see below), whose sum is σ = 857705210. Its totient is φ = 221343264.

The previous prime is 442686523. The next prime is 442686571. The reversal of 442686544 is 445686244.

It can be written as a sum of positive squares in only one way, i.e., 440496144 + 2190400 = 20988^2 + 1480^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442686544.

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 as a sum of consecutive naturals, namely, 13833939 + ... + 13833970.

It is an arithmetic number, because the mean of its divisors is an integer number (85770521).

Almost surely, 2^442686544 is an apocalyptic number.

It is an amenable number.

442686544 is a deficient number, since it is larger than the sum of its proper divisors (415018666).

442686544 is a wasteful number, since it uses less digits than its factorization.

442686544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27667917 (or 27667911 counting only the distinct ones).

The product of its digits is 737280, while the sum is 43.

The square root of 442686544 is about 21040.1174901663. The cubic root of 442686544 is about 762.1353520789.

The spelling of 442686544 in words is "four hundred forty-two million, six hundred eighty-six thousand, five hundred forty-four".