8644442 has 4 divisors (see below), whose sum is σ = 12966666. Its totient is φ = 4322220.

The previous prime is 8644439. The next prime is 8644451. The reversal of 8644442 is 2444468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7230721 + 1413721 = 2689^2 + 1189^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 8644399 and 8644408.

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, 2161109 + ... + 2161112.

Almost surely, 2^8644442 is an apocalyptic number.

8644442 is a deficient number, since it is larger than the sum of its proper divisors (4322224).

8644442 is a wasteful number, since it uses less digits than its factorization.

8644442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322223.

The product of its digits is 24576, while the sum is 32.

The square root of 8644442 is about 2940.1431937918. The cubic root of 8644442 is about 205.2322729152.

The spelling of 8644442 in words is "eight million, six hundred forty-four thousand, four hundred forty-two".