442612644 has 24 divisors (see below), whose sum is σ = 1077666240. Its totient is φ = 141122784.

The previous prime is 442612607. The next prime is 442612679. The reversal of 442612644 is 446216244.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801559 + ... + 802110.

It is an arithmetic number, because the mean of its divisors is an integer number (44902760).

Almost surely, 2^442612644 is an apocalyptic number.

It is an amenable number.

442612644 is an abundant number, since it is smaller than the sum of its proper divisors (635053596).

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

442612644 is a wasteful number, since it uses less digits than its factorization.

442612644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603699 (or 1603697 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

The square root of 442612644 is about 21038.3612479680. The cubic root of 442612644 is about 762.0929406273.

Adding to 442612644 its reverse (446216244), we get a palindrome (888828888).

The spelling of 442612644 in words is "four hundred forty-two million, six hundred twelve thousand, six hundred forty-four".