8425644 has 12 divisors (see below), whose sum is σ = 19659864. Its totient is φ = 2808544.

The previous prime is 8425621. The next prime is 8425657. The reversal of 8425644 is 4465248.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351057 + ... + 351080.

It is an arithmetic number, because the mean of its divisors is an integer number (1638322).

Almost surely, 2^8425644 is an apocalyptic number.

It is an amenable number.

8425644 is an abundant number, since it is smaller than the sum of its proper divisors (11234220).

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

8425644 is a wasteful number, since it uses less digits than its factorization.

8425644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702144 (or 702142 counting only the distinct ones).

The product of its digits is 30720, while the sum is 33.

The square root of 8425644 is about 2902.6959882151. The cubic root of 8425644 is about 203.4859220722.

The spelling of 8425644 in words is "eight million, four hundred twenty-five thousand, six hundred forty-four".