8638444 has 12 divisors (see below), whose sum is σ = 15343384. Its totient is φ = 4254624.

The previous prime is 8638411. The next prime is 8638447. The reversal of 8638444 is 4448368.

It is a super-2 number, since 2×8638444² = 149245429482272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8638447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15849 + ... + 16384.

Almost surely, 2^8638444 is an apocalyptic number.

It is an amenable number.

8638444 is a deficient number, since it is larger than the sum of its proper divisors (6704940).

8638444 is a wasteful number, since it uses less digits than its factorization.

8638444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32304 (or 32302 counting only the distinct ones).

The product of its digits is 73728, while the sum is 37.

The square root of 8638444 is about 2939.1229984470. The cubic root of 8638444 is about 205.1847947016.

The spelling of 8638444 in words is "eight million, six hundred thirty-eight thousand, four hundred forty-four".