8380644 has 12 divisors (see below), whose sum is σ = 19554864. Its totient is φ = 2793544.

The previous prime is 8380621. The next prime is 8380649. The reversal of 8380644 is 4460838.

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

It is not an unprimeable number, because it can be changed into a prime (8380649) 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, 349182 + ... + 349205.

It is an arithmetic number, because the mean of its divisors is an integer number (1629572).

Almost surely, 2^8380644 is an apocalyptic number.

It is an amenable number.

8380644 is an abundant number, since it is smaller than the sum of its proper divisors (11174220).

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

8380644 is a wasteful number, since it uses less digits than its factorization.

8380644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698394 (or 698392 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 8380644 is about 2894.9341961433. The cubic root of 8380644 is about 203.1230134401.

The spelling of 8380644 in words is "eight million, three hundred eighty thousand, six hundred forty-four".