8378644 has 12 divisors (see below), whose sum is σ = 14712544. Its totient is φ = 4175064.

The previous prime is 8378641. The next prime is 8378653. The reversal of 8378644 is 4468738.

It is a junction number, because it is equal to n+sod(n) for n = 8378597 and 8378606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8378641) 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, 2184 + ... + 4639.

Almost surely, 2^8378644 is an apocalyptic number.

It is an amenable number.

8378644 is a deficient number, since it is larger than the sum of its proper divisors (6333900).

8378644 is a wasteful number, since it uses less digits than its factorization.

8378644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134 (or 7132 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 8378644 is about 2894.5887445370. The cubic root of 8378644 is about 203.1068540476.

The spelling of 8378644 in words is "eight million, three hundred seventy-eight thousand, six hundred forty-four".