8381004 has 12 divisors (see below), whose sum is σ = 19555704. Its totient is φ = 2793664.

The previous prime is 8381003. The next prime is 8381047. The reversal of 8381004 is 4001838.

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 (8381003) 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, 349197 + ... + 349220.

It is an arithmetic number, because the mean of its divisors is an integer number (1629642).

Almost surely, 2^8381004 is an apocalyptic number.

It is an amenable number.

8381004 is an abundant number, since it is smaller than the sum of its proper divisors (11174700).

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

8381004 is a wasteful number, since it uses less digits than its factorization.

8381004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698424 (or 698422 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 8381004 is about 2894.9963730547. The cubic root of 8381004 is about 203.1259218577.

The spelling of 8381004 in words is "eight million, three hundred eighty-one thousand, four".