8378645 has 16 divisors (see below), whose sum is σ = 11067840. Its totient is φ = 6088720.

The previous prime is 8378641. The next prime is 8378653. The reversal of 8378645 is 5468738.

8378645 = T₃₁₀ + T₃₁₁ + ... + T₄₃₀.

It is a happy number.

It is not a de Polignac number, because 8378645 - 2² = 8378641 is a prime.

It is an Ulam number.

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 15 ways as a sum of consecutive naturals, for example, 6026 + ... + 7284.

It is an arithmetic number, because the mean of its divisors is an integer number (691740).

Almost surely, 2^8378645 is an apocalyptic number.

It is an amenable number.

8378645 is a deficient number, since it is larger than the sum of its proper divisors (2689195).

8378645 is a wasteful number, since it uses less digits than its factorization.

8378645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297 (or 1275 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 8378645 is about 2894.5889172731. The cubic root of 8378645 is about 203.1068621280.

The spelling of 8378645 in words is "eight million, three hundred seventy-eight thousand, six hundred forty-five".