8423644 has 6 divisors (see below), whose sum is σ = 14741384. Its totient is φ = 4211820.

The previous prime is 8423621. The next prime is 8423651. The reversal of 8423644 is 4463248.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052952 + ... + 1052959.

Almost surely, 2^8423644 is an apocalyptic number.

It is an amenable number.

8423644 is a deficient number, since it is larger than the sum of its proper divisors (6317740).

8423644 is a wasteful number, since it uses less digits than its factorization.

8423644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105915 (or 2105913 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 8423644 is about 2902.3514604541. The cubic root of 8423644 is about 203.4698202744.

The spelling of 8423644 in words is "eight million, four hundred twenty-three thousand, six hundred forty-four".