442644644 has 24 divisors (see below), whose sum is σ = 844273920. Its totient is φ = 201834144.

The previous prime is 442644563. The next prime is 442644647. The reversal of 442644644 is 446446244.

It is a junction number, because it is equal to n+sod(n) for n = 442644598 and 442644607.

It is not an unprimeable number, because it can be changed into a prime (442644647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46964 + ... + 55595.

It is an arithmetic number, because the mean of its divisors is an integer number (35178080).

Almost surely, 2^442644644 is an apocalyptic number.

It is an amenable number.

442644644 is a deficient number, since it is larger than the sum of its proper divisors (401629276).

442644644 is a wasteful number, since it uses less digits than its factorization.

442644644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102659 (or 102657 counting only the distinct ones).

The product of its digits is 294912, while the sum is 38.

The square root of 442644644 is about 21039.1217497309. The cubic root of 442644644 is about 762.1113061114. Note that the first 3 decimals are identical.

The spelling of 442644644 in words is "four hundred forty-two million, six hundred forty-four thousand, six hundred forty-four".